one source for setup part in all tutorials

_src/_guides/_setup.md

@@ -0,0 +1,19 @@
+# Setup
+
+Start by installing the official [BigchainDB JavaScript driver](https://github.com/bigchaindb/js-bigchaindb-driver):
+
+```bash
+npm i bigchaindb-driver
+```
+
+Then, include that as a module and connect to IPDB or any BigchainDB node. In the case of IPDB, create your own `app_id` and `app_key` on [IPDB](https://ipdb.io/#getstarted).
+
+```js
+const BigchainDB = require('bigchaindb-driver')
+
+const API_PATH = 'https://test.ipdb.io/api/v1/'
+const conn = new BigchainDB.Connection(API_PATH, {
+    app_id: 'Get one from developers.ipdb.io',
+    app_key: 'Get one from developers.ipdb.io'
+})
+```

_src/_guides/tutorial-car-telemetry-app.md

@@ -5,7 +5,7 @@ title: "Tutorial: How to create a digital twin of your car"
 tagline: Build a telemetry app to digitally track the mileage of a car
 header: header-car.jpg
 learn: >
-    - How BigchainDB can be used to record dynamic parameters of an asset 
+    - How BigchainDB can be used to record dynamic parameters of an asset
 
     - How assets can be used on BigchainDB to represent real objects
 
@@ -24,25 +24,7 @@ BigchainDB is an ideal solution to create digital twins of smart devices. In thi
 
 Let's get started!
 
-# Setup
-
-Start by installing the official [BigchainDB JavaScript driver](https://github.com/bigchaindb/js-bigchaindb-driver):
-
-```bash
-npm i bigchaindb-driver
-```
-
-Then, include that as a module and connect to IPDB or any BigchainDB node. In the case of IPDB, create your own `app_id` and `app_key` on [IPDB](https://ipdb.io/#getstarted).
-
-```js
-const BigchainDB = require('bigchaindb-driver')
-
-const API_PATH = 'https://test.ipdb.io/api/v1/'
-const conn = new BigchainDB.Connection(API_PATH, {
-    app_id: 'Get one from developers.ipdb.io',
-    app_key: 'Get one from developers.ipdb.io'
-})
-```
+{% include_relative _setup.md %}
 
 # Create a key pair
 
@@ -144,7 +126,7 @@ conn.listTransactions(assetId)
     })
 ```
 
-The `listTransactions` method of BigchainDB retrieves all of the create and transfer transactions with a specific asset id. Then, we check for the inputs that have not been spent yet. This indicates the last transaction. In this tutorial, we are just working with one input and one output for each transaction, so there should be just one input that has not been spent yet, namely the one belonging to the last transaction. 
+The `listTransactions` method of BigchainDB retrieves all of the create and transfer transactions with a specific asset id. Then, we check for the inputs that have not been spent yet. This indicates the last transaction. In this tutorial, we are just working with one input and one output for each transaction, so there should be just one input that has not been spent yet, namely the one belonging to the last transaction.
 
 Based on that, we can now create the transfer transaction:
 

_src/_guides/tutorial-token-launch.md

@@ -8,42 +8,25 @@ header: header-token.jpg
 learn: >
 
     - How to use divisible assets on BigchainDB
-    
+
     - How assets in BigchainDB can represent tokens
-    
+
     - How tokens can be distributed to participants using TRANSFER transactions
-    
 ---
 
 Hi there! Welcome to our second tutorial about divisible assets. For this tutorial, we assume that you are familiar with the BigchainDB primitives (assets, inputs, outputs, transactions etc.). If you are not, familiarize yourself with [Key concepts of BigchainDB](../key-concepts-of-bigchaindb/).
 
 # About token distribution events
 
-In the last 12 months we have witnessed exponential growth in token distribution events. Most of them have been launched on Ethereum. Since we are experiencing rising interest in potential token launches on BigchainDB, this tutorial aims at showing a very simple approach on how to launch your own token on BigchainDB. Note however, that we do not support ERC20 and no one has launched tokens on BigchainDB yet. This tutorial just aims at showing one possible approach.  
+In the last 12 months we have witnessed exponential growth in token distribution events. Most of them have been launched on Ethereum. Since we are experiencing rising interest in potential token launches on BigchainDB, this tutorial aims at showing a very simple approach on how to launch your own token on BigchainDB.
 
-# Setup
+Note however, that we do not support ERC20 and no one has launched tokens on BigchainDB yet. This tutorial just aims at showing one possible approach.
 
-Start by installing the official [BigchainDB JavaScript driver](https://github.com/bigchaindb/js-bigchaindb-driver):
-
-```bash
-npm i bigchaindb-driver
-```
-
-Then, include that as a module and connect to IPDB or any BigchainDB node. In the case of IPDB, create your own `app_id` and `app_key` on [IPDB](https://ipdb.io/#getstarted).
-
-```js
-const BigchainDB = require('bigchaindb-driver')
-
-const API_PATH = 'https://test.ipdb.io/api/v1/'
-const conn = new BigchainDB.Connection(API_PATH, {
-    app_id: 'Get one from developers.ipdb.io',
-    app_key: 'Same as app_id'
-})
-```
+{% include_relative _setup.md %}
 
 # Usage of divisible assets to create tokens
 
-BigchainDB supports divisible assets. A divisible asset is an asset that has a fixed number of sub-assets linked to it. These fixed sub-assets that are linked to it, represent your tokens. When creating a divisible asset in BigchainDB, the number of the sub-assets (tokens) that you want to create needs to be specified. That represents your fixed total supply of tokens. The code below illustrates how to create a divisible asset with 10000 tokens associated to it. 
+BigchainDB supports divisible assets. A divisible asset is an asset that has a fixed number of sub-assets linked to it. These fixed sub-assets that are linked to it, represent your tokens. When creating a divisible asset in BigchainDB, the number of the sub-assets (tokens) that you want to create needs to be specified. That represents your fixed total supply of tokens. The code below illustrates how to create a divisible asset with 10000 tokens associated to it.
 
 ```js
 const nTokens = 10000