diff --git a/.eslintignore b/.eslintignore
index db4c6d9..007ea8a 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,2 +1,3 @@
 dist
-node_modules
\ No newline at end of file
+node_modules
+coverage
diff --git a/.gitignore b/.gitignore
index 55fafa3..71ebeb4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,6 @@
 node_modules
 dist
 package-lock.json
+coverage
+coverage.lcov
+.nyc_output
diff --git a/.travis.yml b/.travis.yml
index 1a817bc..cde552a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,7 @@ before_install:
       -e BIGCHAINDB_DATABASE_HOST=172.17.0.1
       bigchaindb/bigchaindb:master
       start
+    - npm install -g codecov
 
 script: yarn test
 
diff --git a/package.json b/package.json
index 43ca2c6..82821a9 100644
--- a/package.json
+++ b/package.json
@@ -19,12 +19,13 @@
     "build:cjs": "cross-env BABEL_ENV=cjs babel ./src -d dist/node",
     "build:dist": "cross-env NODE_ENV=production webpack -p",
     "clean": "rimraf dist/bundle dist/node",
-    "test": "npm run lint && ava",
+    "test": "npm run lint && nyc ava test/ && npm run report-coverage",
     "release": "./node_modules/release-it/bin/release.js --src.tagName='v%s' --github.release --npm.publish --non-interactive",
     "release-minor": "./node_modules/release-it/bin/release.js minor --src.tagName='v%s' --github.release --npm.publish --non-interactive",
     "release-major": "./node_modules/release-it/bin/release.js major --src.tagName='v%s' --github.release --npm.publish --non-interactive",
     "prepublishOnly": "npm update && npm run build",
-    "precommit": "npm run lint"
+    "precommit": "npm run lint",
+    "report-coverage": "nyc report --reporter=lcov > coverage.lcov && codecov"
   },
   "devDependencies": {
     "ava": "^0.19.1",
@@ -45,6 +46,7 @@
     "eslint-config-ascribe": "^3.0.4",
     "eslint-plugin-import": "^2.2.0",
     "husky": "^0.13.4",
+    "nyc": "^11.0.2",
     "release-it": "^2.7.3",
     "rimraf": "^2.5.4",
     "sinon": "^2.3.4",
@@ -66,7 +68,8 @@
     "json-stable-stringify": "^1.0.1",
     "query-string": "^4.3.4",
     "sprintf-js": "^1.0.3",
-    "tweetnacl": "^1.0.0"
+    "tweetnacl": "^1.0.0",
+    "yarn": "^0.24.5"
   },
   "keywords": [
     "bigchaindb",
diff --git a/yarn.lock b/yarn.lock
index 3856e56..5c3c449 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -101,6 +101,10 @@ ansi-escapes@^1.1.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
 
+ansi-escapes@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-2.0.0.tgz#5bae52be424878dd9783e8910e3fc2922e83c81b"
+
 ansi-regex@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
@@ -505,10 +509,10 @@ babel-helpers@^6.24.1:
     babel-template "^6.24.1"
 
 babel-loader@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/babel-loader/-/babel-loader-7.0.0.tgz#2e43a66bee1fff4470533d0402c8a4532fafbaf7"
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/babel-loader/-/babel-loader-7.1.0.tgz#3fbf2581f085774bd9642dca9990e6d6c1491144"
   dependencies:
-    find-cache-dir "^0.1.1"
+    find-cache-dir "^1.0.0"
     loader-utils "^1.0.2"
     mkdirp "^0.5.1"
 
@@ -877,7 +881,7 @@ babel-register@^6.24.1:
     mkdirp "^0.5.1"
     source-map-support "^0.4.2"
 
-babel-runtime@^6.18.0, babel-runtime@^6.22.0, babel-runtime@^6.9.2:
+babel-runtime@^6.0.0, babel-runtime@^6.18.0, babel-runtime@^6.22.0, babel-runtime@^6.9.2:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.23.0.tgz#0a9489f144de70efb3ce4300accdb329e2fc543b"
   dependencies:
@@ -953,6 +957,12 @@ bindings@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/bindings/-/bindings-1.2.1.tgz#14ad6113812d2d37d72e67b4cacb4bb726505f11"
 
+bl@^1.0.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.1.tgz#cac328f7bee45730d404b692203fcb590e172d5e"
+  dependencies:
+    readable-stream "^2.0.5"
+
 block-stream@*:
   version "0.0.9"
   resolved "https://registry.yarnpkg.com/block-stream/-/block-stream-0.0.9.tgz#13ebfe778a03205cfe03751481ebb4b3300c126a"
@@ -964,8 +974,8 @@ bluebird@^3.0.0:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.0.tgz#791420d7f551eea2897453a8a77653f96606d67c"
 
 bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.4.0:
-  version "4.11.6"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.6.tgz#53344adb14617a13f6e8dd2ce28905d1c0ba3215"
+  version "4.11.7"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.7.tgz#ddb048e50d9482790094c13eb3fcfc833ce7ab46"
 
 boom@2.x.x:
   version "2.10.1"
@@ -1102,6 +1112,10 @@ builtin-status-codes@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"
 
+bytes@^2.4.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.5.0.tgz#4c9423ea2d252c270c41b2bdefeff9bb6b62c06a"
+
 caching-transform@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/caching-transform/-/caching-transform-1.0.1.tgz#6dbdb2f20f8d8fbce79f3e94e9d1742dcdf5c0a1"
@@ -1204,6 +1218,10 @@ chokidar@^1.4.2, chokidar@^1.4.3, chokidar@^1.6.1:
   optionalDependencies:
     fsevents "^1.0.0"
 
+chownr@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.0.1.tgz#e2a75042a9551908bebd25b8523d5f9769d79181"
+
 ci-info@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.0.0.tgz#dc5285f2b4e251821683681c381c3388f46ec534"
@@ -1277,6 +1295,13 @@ clone@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.1.tgz#d217d1e961118e3ac9a4b8bba3285553bf647cdb"
 
+cmd-shim@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/cmd-shim/-/cmd-shim-2.0.2.tgz#6fcbda99483a8fd15d7d30a196ca69d688a2efdb"
+  dependencies:
+    graceful-fs "^4.1.2"
+    mkdirp "~0.5.0"
+
 co-with-promise@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co-with-promise/-/co-with-promise-4.6.0.tgz#413e7db6f5893a60b942cf492c4bec93db415ab7"
@@ -1313,7 +1338,7 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^2.8.1:
+commander@^2.8.1, commander@^2.9.0:
   version "2.9.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
   dependencies:
@@ -1504,6 +1529,10 @@ date-time@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/date-time/-/date-time-0.1.1.tgz#ed2f6d93d9790ce2fd66d5b5ff3edd5bbcbf3b07"
 
+death@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/death/-/death-1.1.0.tgz#01aa9c401edd92750514470b8266390c66c67318"
+
 debug@2, debug@^2.1.1, debug@^2.2.0:
   version "2.6.8"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
@@ -1573,7 +1602,7 @@ diff-match-patch@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/diff-match-patch/-/diff-match-patch-1.0.0.tgz#1cc3c83a490d67f95d91e39f6ad1f2e086b63048"
 
-diff@^3.0.0, diff@^3.0.1:
+diff@^3.0.0, diff@^3.0.1, diff@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
 
@@ -1613,6 +1642,15 @@ duplexer3@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/duplexer3/-/duplexer3-0.1.4.tgz#ee01dd1cac0ed3cbc7fdbea37dc0a8f1ce002ce2"
 
+duplexify@^3.1.2, duplexify@^3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/duplexify/-/duplexify-3.5.0.tgz#1aa773002e1578457e9d9d4a50b0ccaaebcbd604"
+  dependencies:
+    end-of-stream "1.0.0"
+    inherits "^2.0.1"
+    readable-stream "^2.0.0"
+    stream-shift "^1.0.0"
+
 ecc-jsbn@~0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz#0fc73a9ed5f0d53c38193398523ef7e543777505"
@@ -1655,6 +1693,18 @@ encoding@^0.1.11:
   dependencies:
     iconv-lite "~0.4.13"
 
+end-of-stream@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.0.0.tgz#d4596e702734a93e40e9af864319eabd99ff2f0e"
+  dependencies:
+    once "~1.3.0"
+
+end-of-stream@^1.0.0, end-of-stream@^1.1.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.0.tgz#7a90d833efda6cfa6eac0f4949dbb0fad3a63206"
+  dependencies:
+    once "^1.4.0"
+
 enhanced-resolve@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-3.1.0.tgz#9f4b626f577245edcf4b2ad83d86e17f4f421dec"
@@ -1761,9 +1811,9 @@ eslint-config-airbnb-base@^11.1.0:
   version "11.2.0"
   resolved "https://registry.yarnpkg.com/eslint-config-airbnb-base/-/eslint-config-airbnb-base-11.2.0.tgz#19a9dc4481a26f70904545ec040116876018f853"
 
-eslint-config-ascribe@^3.0.1:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/eslint-config-ascribe/-/eslint-config-ascribe-3.0.3.tgz#d1f4c2eb5b15b467e8423e109449ca33f3a90825"
+eslint-config-ascribe@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/eslint-config-ascribe/-/eslint-config-ascribe-3.0.4.tgz#d60a5ea879698ebe0d6ba252b4e12d6f43902198"
   dependencies:
     eslint-config-airbnb-base "^11.1.0"
 
@@ -1870,20 +1920,16 @@ esquery@^1.0.0:
     estraverse "^4.0.0"
 
 esrecurse@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.1.0.tgz#4713b6536adf7f2ac4f327d559e7756bff648220"
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.0.tgz#fa9568d98d3823f9a41d91e902dcab9ea6e5b163"
   dependencies:
-    estraverse "~4.1.0"
+    estraverse "^4.1.0"
     object-assign "^4.0.1"
 
-estraverse@^4.0.0, estraverse@^4.1.1, estraverse@^4.2.0:
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
 
-estraverse@~4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.1.1.tgz#f6caca728933a850ef90661d0e17982ba47111a2"
-
 esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
@@ -1948,7 +1994,7 @@ extend@3, extend@~3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
 
-external-editor@^2.0.1:
+external-editor@^2.0.1, external-editor@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-2.0.4.tgz#1ed9199da9cbfe2ef2f7a31b2fde8b0d12368972"
   dependencies:
@@ -2024,6 +2070,14 @@ find-cache-dir@^0.1.1:
     mkdirp "^0.5.1"
     pkg-dir "^1.0.0"
 
+find-cache-dir@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-1.0.0.tgz#9288e3e9e3cc3748717d39eade17cf71fc30ee6f"
+  dependencies:
+    commondir "^1.0.1"
+    make-dir "^1.0.0"
+    pkg-dir "^2.0.0"
+
 find-parent-dir@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/find-parent-dir/-/find-parent-dir-0.3.0.tgz#33c44b429ab2b2f0646299c5f9f718f376ff8d54"
@@ -2094,6 +2148,12 @@ form-data@~2.1.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
+formatio@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/formatio/-/formatio-1.2.0.tgz#f3b2167d9068c4698a8d51f4f760a39a54d818eb"
+  dependencies:
+    samsam "1.x"
+
 fs-readdir-recursive@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs-readdir-recursive/-/fs-readdir-recursive-1.0.0.tgz#8cd1745c8b4f8a29c8caec392476921ba195f560"
@@ -2275,6 +2335,17 @@ graceful-fs@4.1.11, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4,
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
 
+gunzip-maybe@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/gunzip-maybe/-/gunzip-maybe-1.4.0.tgz#7d8316c8d0571e1d08a5a79e46fff0afe8172b19"
+  dependencies:
+    browserify-zlib "^0.1.4"
+    is-deflate "^1.0.0"
+    is-gzip "^1.0.0"
+    peek-stream "^1.1.0"
+    pumpify "^1.3.3"
+    through2 "^2.0.3"
+
 har-schema@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-1.0.5.tgz#d263135f43307c02c602afc8fe95970c0151369e"
@@ -2325,10 +2396,11 @@ hash-base@^2.0.0:
     inherits "^2.0.1"
 
 hash.js@^1.0.0, hash.js@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.0.3.tgz#1332ff00156c0a0ffdd8236013d07b77a0451573"
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.1.1.tgz#5cb2e796499224e69fd0b00ed01d2d4a16e7a323"
   dependencies:
-    inherits "^2.0.1"
+    inherits "^2.0.3"
+    minimalistic-assert "^1.0.0"
 
 hawk@~3.1.3:
   version "3.1.3"
@@ -2463,7 +2535,7 @@ inherits@2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
 
-ini@~1.3.0:
+ini@^1.3.4, ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
 
@@ -2503,6 +2575,25 @@ inquirer@^0.12.0:
     strip-ansi "^3.0.0"
     through "^2.3.6"
 
+inquirer@^3.0.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-3.1.1.tgz#87621c4fba4072f48a8dd71c9f9df6f100b2d534"
+  dependencies:
+    ansi-escapes "^2.0.0"
+    chalk "^1.0.0"
+    cli-cursor "^2.1.0"
+    cli-width "^2.0.0"
+    external-editor "^2.0.4"
+    figures "^2.0.0"
+    lodash "^4.3.0"
+    mute-stream "0.0.7"
+    run-async "^2.2.0"
+    rx-lite "^4.0.8"
+    rx-lite-aggregates "^4.0.8"
+    string-width "^2.0.0"
+    strip-ansi "^3.0.0"
+    through "^2.3.6"
+
 interpret@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.0.3.tgz#cbc35c62eeee73f19ab7b10a801511401afc0f90"
@@ -2541,12 +2632,16 @@ is-builtin-module@^1.0.0:
   dependencies:
     builtin-modules "^1.0.0"
 
-is-ci@^1.0.7, is-ci@^1.0.9:
+is-ci@^1.0.10, is-ci@^1.0.7, is-ci@^1.0.9:
   version "1.0.10"
   resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
   dependencies:
     ci-info "^1.0.0"
 
+is-deflate@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-deflate/-/is-deflate-1.0.0.tgz#c862901c3c161fb09dac7cdc7e784f80e98f2f14"
+
 is-dotfile@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/is-dotfile/-/is-dotfile-1.0.3.tgz#a6a2f32ffd2dfb04f5ca25ecd0f6b83cf798a1e1"
@@ -2595,6 +2690,10 @@ is-glob@^2.0.0, is-glob@^2.0.1:
   dependencies:
     is-extglob "^1.0.0"
 
+is-gzip@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-gzip/-/is-gzip-1.0.0.tgz#6ca8b07b99c77998025900e555ced8ed80879a83"
+
 is-my-json-valid@^2.10.0:
   version "2.16.0"
   resolved "https://registry.yarnpkg.com/is-my-json-valid/-/is-my-json-valid-2.16.0.tgz#f079dd9bfdae65ee2038aae8acbc86ab109e3693"
@@ -2700,6 +2799,10 @@ is-windows@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.1.tgz#310db70f742d259a16a369202b51af84233310d9"
 
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+
 isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
@@ -3013,6 +3116,10 @@ lodash@4.17.4, lodash@^4.0.0, lodash@^4.14.0, lodash@^4.2.0, lodash@^4.3.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
+lolex@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/lolex/-/lolex-1.6.0.tgz#3a9a0283452a47d7439e72731b9e07d7386e49f6"
+
 longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
@@ -3191,7 +3298,7 @@ mute-stream@0.0.5:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.5.tgz#8fbfabb0a98a253d3184331f9e8deb7372fac6c0"
 
-mute-stream@0.0.7:
+mute-stream@0.0.7, mute-stream@~0.0.4:
   version "0.0.7"
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.7.tgz#3075ce93bc21b8fab43e1bc4da7e8115ed1e7bab"
 
@@ -3199,6 +3306,10 @@ nan@^2.0.9, nan@^2.3.0:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.6.2.tgz#e4ff34e6c95fdfb5aecc08de6596f43605a7db45"
 
+native-promise-only@^0.8.1:
+  version "0.8.1"
+  resolved "https://registry.yarnpkg.com/native-promise-only/-/native-promise-only-0.8.1.tgz#20a318c30cb45f71fe7adfbf7b21c99c1472ef11"
+
 natural-compare@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
@@ -3207,6 +3318,12 @@ netrc@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/netrc/-/netrc-0.1.4.tgz#6be94fcaca8d77ade0a9670dc460914c94472444"
 
+node-emoji@^1.0.4:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/node-emoji/-/node-emoji-1.5.1.tgz#fd918e412769bf8c448051238233840b2aff16a1"
+  dependencies:
+    string.prototype.codepointat "^0.2.0"
+
 node-fetch@1.5.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.5.1.tgz#edc64350cc0bca48a5f79e038c1f7c5ff0869fef"
@@ -3214,7 +3331,14 @@ node-fetch@1.5.1:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
-node-fetch@^1.0.1, node-fetch@~1.6.0:
+node-fetch@^1.0.1:
+  version "1.7.1"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.7.1.tgz#899cb3d0a3c92f952c47f1b876f4c8aeabd400d5"
+  dependencies:
+    encoding "^0.1.11"
+    is-stream "^1.0.1"
+
+node-fetch@~1.6.0:
   version "1.6.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
   dependencies:
@@ -3322,6 +3446,10 @@ object-assign@^4.0.1, object-assign@^4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
+object-path@^0.11.2:
+  version "0.11.4"
+  resolved "https://registry.yarnpkg.com/object-path/-/object-path-0.11.4.tgz#370ae752fbf37de3ea70a861c23bba8915691949"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -3342,12 +3470,18 @@ oer-utils@^1.2.0:
   dependencies:
     core-js "^2.4.1"
 
-once@^1.3.0, once@^1.3.3:
+once@^1.3.0, once@^1.3.1, once@^1.3.3, once@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
   dependencies:
     wrappy "1"
 
+once@~1.3.0:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.3.3.tgz#b2e261557ce4c314ec8304f3fa82663e4297ca20"
+  dependencies:
+    wrappy "1"
+
 onetime@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
@@ -3517,6 +3651,12 @@ path-key@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
 
+path-to-regexp@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.7.0.tgz#59fde0f435badacba103a84e9d3bc64e96b9937d"
+  dependencies:
+    isarray "0.0.1"
+
 path-type@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-1.1.0.tgz#59c44f7ee491da704da415da5a4070ba4f8fe441"
@@ -3541,6 +3681,13 @@ pbkdf2@^3.0.3:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
+peek-stream@^1.1.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/peek-stream/-/peek-stream-1.1.2.tgz#97eb76365bcfd8c89e287f55c8b69d4c3e9bcc52"
+  dependencies:
+    duplexify "^3.5.0"
+    through2 "^2.0.3"
+
 performance-now@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-0.2.0.tgz#33ef30c5c77d4ea21c5a53869d91b56d8f2555e5"
@@ -3650,6 +3797,13 @@ progress@^1.1.8:
   version "1.1.8"
   resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"
 
+proper-lockfile@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/proper-lockfile/-/proper-lockfile-2.0.1.tgz#159fb06193d32003f4b3691dd2ec1a634aa80d1d"
+  dependencies:
+    graceful-fs "^4.1.2"
+    retry "^0.10.0"
+
 prr@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/prr/-/prr-0.0.0.tgz#1a84b85908325501411853d0081ee3fa86e2926a"
@@ -3668,6 +3822,21 @@ public-encrypt@^4.0.0:
     parse-asn1 "^5.0.0"
     randombytes "^2.0.1"
 
+pump@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-1.0.2.tgz#3b3ee6512f94f0e575538c17995f9f16990a5d51"
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
+pumpify@^1.3.3:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.3.5.tgz#1b671c619940abcaeac0ad0e3a3c164be760993b"
+  dependencies:
+    duplexify "^3.1.2"
+    inherits "^2.0.1"
+    pump "^1.0.0"
+
 punycode@1.3.2:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.3.2.tgz#9653a036fb7c1ee42342f2325cceefea3926c48d"
@@ -3747,7 +3916,13 @@ read-pkg@^2.0.0:
     normalize-package-data "^2.3.2"
     path-type "^2.0.0"
 
-readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.6:
+read@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/read/-/read-1.0.7.tgz#b3da19bd052431a97671d44a42634adf710b40c4"
+  dependencies:
+    mute-stream "~0.0.4"
+
+readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.6:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.0.tgz#640f5dcda88c91a8dc60787145629170813a1ed2"
   dependencies:
@@ -3884,6 +4059,10 @@ repeating@^2.0.0:
   dependencies:
     is-finite "^1.0.0"
 
+request-capture-har@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/request-capture-har/-/request-capture-har-1.2.2.tgz#cd692cfb2cc744fd84a3358aac6ee51528cf720d"
+
 request@^2.81.0:
   version "2.81.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
@@ -3966,13 +4145,17 @@ restore-cursor@^2.0.0:
     onetime "^2.0.0"
     signal-exit "^3.0.2"
 
+retry@^0.10.0:
+  version "0.10.1"
+  resolved "https://registry.yarnpkg.com/retry/-/retry-0.10.1.tgz#e76388d217992c252750241d3d3956fed98d8ff4"
+
 right-align@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/right-align/-/right-align-0.1.3.tgz#61339b722fe6a3515689210d24e14c96148613ef"
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
+rimraf@2, rimraf@^2.2.8, rimraf@^2.5.0, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.1.tgz#c2338ec643df7a1b7fe5c54fa86f57428a55f33d"
   dependencies:
@@ -3997,6 +4180,16 @@ run-async@^2.2.0:
   dependencies:
     is-promise "^2.1.0"
 
+rx-lite-aggregates@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/rx-lite-aggregates/-/rx-lite-aggregates-4.0.8.tgz#753b87a89a11c95467c4ac1626c4efc4e05c67be"
+  dependencies:
+    rx-lite "*"
+
+rx-lite@*, rx-lite@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-4.0.8.tgz#0b1e11af8bc44836f04a6407e92da42467b79444"
+
 rx-lite@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
@@ -4013,6 +4206,10 @@ safe-buffer@~5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
 
+samsam@1.x, samsam@^1.1.3:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/samsam/-/samsam-1.2.1.tgz#edd39093a3184370cb859243b2bdf255e7d8ea67"
+
 semver-diff@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/semver-diff/-/semver-diff-2.1.0.tgz#4bbb8437c8d37e4b0cf1a68fd726ec6d645d6d36"
@@ -4059,7 +4256,7 @@ shebang-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
 
-shelljs@0.7.7, shelljs@^0.7.5:
+shelljs@0.7.7:
   version "0.7.7"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.7.tgz#b2f5c77ef97148f4b4f6e22682e10bba8667cff1"
   dependencies:
@@ -4067,10 +4264,31 @@ shelljs@0.7.7, shelljs@^0.7.5:
     interpret "^1.0.0"
     rechoir "^0.6.2"
 
+shelljs@^0.7.5:
+  version "0.7.8"
+  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.8.tgz#decbcf874b0d1e5fb72e14b164a9683048e9acb3"
+  dependencies:
+    glob "^7.0.0"
+    interpret "^1.0.0"
+    rechoir "^0.6.2"
+
 signal-exit@^3.0.0, signal-exit@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
+sinon@^2.3.4:
+  version "2.3.5"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-2.3.5.tgz#9a2fc0ff8d526da716f30953aa2c65d518917f6c"
+  dependencies:
+    diff "^3.1.0"
+    formatio "1.2.0"
+    lolex "^1.6.0"
+    native-promise-only "^0.8.1"
+    path-to-regexp "^1.7.0"
+    samsam "^1.1.3"
+    text-encoding "0.6.4"
+    type-detect "^4.0.0"
+
 slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
@@ -4174,6 +4392,10 @@ stream-http@^2.3.1:
     to-arraybuffer "^1.0.0"
     xtend "^4.0.0"
 
+stream-shift@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"
+
 strict-uri-encode@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz#279b225df1d582b1f54e65addd4352e18faa0713"
@@ -4193,6 +4415,10 @@ string-width@^2.0.0:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^3.0.0"
 
+string.prototype.codepointat@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/string.prototype.codepointat/-/string.prototype.codepointat-0.2.0.tgz#6b26e9bd3afcaa7be3b4269b526de1b82000ac78"
+
 string_decoder@^0.10.25:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
@@ -4280,6 +4506,15 @@ tapable@^0.2.5, tapable@~0.2.5:
   version "0.2.6"
   resolved "https://registry.yarnpkg.com/tapable/-/tapable-0.2.6.tgz#206be8e188860b514425375e6f1ae89bfb01fd8d"
 
+tar-fs@^1.15.1:
+  version "1.15.3"
+  resolved "https://registry.yarnpkg.com/tar-fs/-/tar-fs-1.15.3.tgz#eccf935e941493d8151028e636e51ce4c3ca7f20"
+  dependencies:
+    chownr "^1.0.1"
+    mkdirp "^0.5.1"
+    pump "^1.0.0"
+    tar-stream "^1.1.2"
+
 tar-pack@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/tar-pack/-/tar-pack-3.4.0.tgz#23be2d7f671a8339376cbdb0b8fe3fdebf317984"
@@ -4293,6 +4528,15 @@ tar-pack@^3.4.0:
     tar "^2.2.1"
     uid-number "^0.0.6"
 
+tar-stream@^1.1.2, tar-stream@^1.5.2:
+  version "1.5.4"
+  resolved "https://registry.yarnpkg.com/tar-stream/-/tar-stream-1.5.4.tgz#36549cf04ed1aee9b2a30c0143252238daf94016"
+  dependencies:
+    bl "^1.0.0"
+    end-of-stream "^1.0.0"
+    readable-stream "^2.0.0"
+    xtend "^4.0.0"
+
 tar@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/tar/-/tar-2.2.1.tgz#8e4d2a256c0e2185c6b18ad694aec968b83cb1d1"
@@ -4307,11 +4551,15 @@ term-size@^0.1.0:
   dependencies:
     execa "^0.4.0"
 
+text-encoding@0.6.4:
+  version "0.6.4"
+  resolved "https://registry.yarnpkg.com/text-encoding/-/text-encoding-0.6.4.tgz#e399a982257a276dae428bb92845cb71bdc26d19"
+
 text-table@^0.2.0, text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
 
-through2@^2.0.0:
+through2@^2.0.0, through2@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
   dependencies:
@@ -4397,6 +4645,10 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
+type-detect@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.3.tgz#0e3f2670b44099b0b46c284d136a7ef49c74c2ea"
+
 typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
@@ -4486,10 +4738,14 @@ util@0.10.3, util@^0.10.3:
   dependencies:
     inherits "2.0.1"
 
-uuid@^3.0.0:
+uuid@^3.0.0, uuid@^3.0.1:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
 
+v8-compile-cache@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-1.1.0.tgz#1dc2a340fb8e5f800a32bcdbfb8c23cd747021b9"
+
 v8flags@^2.0.10:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/v8flags/-/v8flags-2.1.1.tgz#aab1a1fa30d45f88dd321148875ac02c0b55e5b4"
@@ -4697,3 +4953,41 @@ yargs@~3.10.0:
     cliui "^2.1.0"
     decamelize "^1.0.0"
     window-size "0.1.0"
+
+yarn@^0.24.5:
+  version "0.24.6"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-0.24.6.tgz#4a128448000425f45df5cd6280b003a6201044fc"
+  dependencies:
+    babel-runtime "^6.0.0"
+    bytes "^2.4.0"
+    camelcase "^4.0.0"
+    chalk "^1.1.1"
+    cmd-shim "^2.0.1"
+    commander "^2.9.0"
+    death "^1.0.0"
+    debug "^2.2.0"
+    detect-indent "^5.0.0"
+    gunzip-maybe "^1.4.0"
+    ini "^1.3.4"
+    inquirer "^3.0.1"
+    invariant "^2.2.0"
+    is-builtin-module "^1.0.0"
+    is-ci "^1.0.10"
+    leven "^2.0.0"
+    loud-rejection "^1.2.0"
+    minimatch "^3.0.3"
+    mkdirp "^0.5.1"
+    node-emoji "^1.0.4"
+    object-path "^0.11.2"
+    proper-lockfile "^2.0.0"
+    read "^1.0.7"
+    request "^2.81.0"
+    request-capture-har "^1.2.2"
+    rimraf "^2.5.0"
+    semver "^5.1.0"
+    strip-bom "^3.0.0"
+    tar-fs "^1.15.1"
+    tar-stream "^1.5.2"
+    uuid "^3.0.1"
+    v8-compile-cache "^1.1.0"
+    validate-npm-package-license "^3.0.1"