Install React Bootstrap Dependency - section added (#313)

* Install React Bootstrap Dependency - section added

* Updated with short intro clarification

* Moved React Bootstrap after Add Images

Author: manavsehgal

template/README.md

@@ -231,6 +231,34 @@ Please be advised that this is also a custom feature of Webpack.
 
 **It is not required for React** but many people enjoy it (and React Native uses a similar mechanism for images). However it may not be portable to some other environments, such as Node.js and Browserify. If you prefer to reference static assets in a more traditional way outside the module system, please let us know [in this issue](https://github.com/facebookincubator/create-react-app/issues/28), and we will consider support for this.
 
+### Install React Bootstrap
+
+React Bootstrap is not a dependency for using React however it is a popular alternative for integrating Bootstrap with React apps. It can be integrated with Create React App workflow using following three steps.
+
+**Step 1.** Install React Bootstrap and Bootstrap from NPM. React Bootstrap does not include Bootstrap CSS so this needs to be installed as well.
+
+```
+npm install react-bootstrap --save
+npm install bootstrap@3 --save
+```
+
+**Step 2.** Import Bootstrap CSS and optionally Bootstrap theme CSS in the ```index.js``` file.
+
+```
+import './index.css';
+import 'bootstrap/dist/css/bootstrap.css';
+import 'bootstrap/dist/css/bootstrap-theme.css';
+```
+
+**Step 3.** Import required React Bootstrap components within ```App.js``` file or your custom component file.
+
+```
+import React, { Component } from 'react';
+import { Navbar, Jumbotron, Button } from 'react-bootstrap';
+``` 
+
+Now you are ready to use the imported React Bootstrap components within your component hierarchy defined in the render method. Here is an example [App.js](https://github.com/manavsehgal/react-eshop/blob/master/src/App.js) redone using React Bootstrap.
+
 ### Display Lint Output in the Editor
 
 >Note: this feature is available with `react-scripts@0.2.0` and higher.