remove boolean comparison for numbers & add docs

docs/source/usage.rst

@@ -45,11 +45,36 @@ To do so, you need to pass the **app_id and app_key**.
 
 .. code-block:: js
 
-	let conn = new driver.Connection('https://test.bigchaindb.com/api/v1/', {
+	const conn = new driver.Connection('https://test.bigchaindb.com/api/v1/', {
 		app_id: 'Get one from testnet.bigchaindb.com',
 		app_key: 'Get one from testnet.bigchaindb.com'
 	})
 
+A more complex connection can be created if the intention is to connect to 
+different nodes of a BigchainDB network.
+The connection strategy will be the one specified in the BEP-14_
+
+.. _BEP-14: https://github.com/bigchaindb/BEPs/tree/master/14#connection-strategy
+
+.. code-block:: js
+
+	const conn = new driver.Connection([
+    'https://test.bigchaindb.com',  // the first node does not use custom headers, only common headers
+    {endpoint: 'https://test.bigchaindb.com/api/v1/',
+     headers: {app_id: 'your_app_id',
+               app_key: 'your_app_key'}},
+    {endpoint: 'https://test2.bigchaindb.com/api/v1/',
+     headers: {app_id: 'your_app_id',
+               app_key: 'your_app_key',
+               extra_header: 'extra value'}},
+    {endpoint: 'https://test3.bigchaindb.com/api/v1/',
+     headers: {app_id: 'your_app_id',
+               app_key: 'your_app_key',
+       	       other_header: 'other value'}},
+    {endpoint: 'https://test4.bigchaindb.com/api/v1/',
+     headers: {custom_auth: 'custom token'}],
+     {'Content-Type': 'application/json'},  // this header is used by all nodes)
+
 Cryptographic Identities Generation
 -----------------------------------
 Alice and Bob are represented by public/private key pairs. The private key is

src/connection.js

@@ -19,7 +19,7 @@ const DEFAULT_TIMEOUT = 20000 // The default value is 20 seconds
  */
 
 export default class Connection {
-    // 20 seconds is the default value for a timeout if not specified
+    // This driver implements the BEP-14 https://github.com/bigchaindb/BEPs/tree/master/14
     constructor(nodes, headers = {}, timeout = DEFAULT_TIMEOUT) {
         // Copy object
         this.headers = Object.assign({}, headers)
@@ -42,7 +42,7 @@ export default class Connection {
             this.normalizedNodes.push(Connection.normalizeNode(nodes, this.headers))
         }
 
-        this.transport = new Transport(this.normalizedNodes, timeout) // TODO
+        this.transport = new Transport(this.normalizedNodes, timeout)
     }
 
     static normalizeNode(node, headers) {

src/transport.js

@@ -42,7 +42,7 @@ export default class Transport {
         let response
         let connection
         // A new request will be executed until there is a valid response or timeout < 0
-        while (!this.timeout || this.timeout > 0) {
+        while (this.timeout >= 0) {
             connection = this.pickConnection()
             // Date in milliseconds
             const startTime = Date.now()
@@ -55,7 +55,7 @@ export default class Transport {
                     this.maxBackoffTime
                 )
                 const elapsed = Date.now() - startTime
-                if (connection.backoffTime && this.timeout) {
+                if (connection.backoffTime > 0 && this.timeout > 0) {
                     this.timeout -= elapsed
                 } else {
                     // No connection error, the response is valid