Updated README file

Author: Hiranya Jayathilaka

README.md

@@ -3,6 +3,9 @@
 ## Table of Contents
 
  * [Overview](#overview)
+ * [Installation](#installation)
+ * [Contributing](#contributing)
+ * [Supported Python Versions](#supported-python-versions)
  * [Documentation](#documentation)
  * [License and Terms](#license-and-terms)
 
@@ -18,12 +21,38 @@ For more information, visit the
 [Firebase Admin SDK setup guide](https://firebase.google.com/docs/admin/setup/).
 
 
+## Installation
+
+To install Firebase Admin Python SDK, simply execute the following command
+in a terminal:
+
+```
+pip install firebase-admin
+```
+
+## Contributing
+
+Please refer to the [CONTRIBUTING page](./CONTRIBUTING.md) for more information
+about how you can contribute to this project. We welcome bug reports, feature
+requests, code review feedback, and also pull requests. 
+
+
+## Supported Python Versions
+
+We support Python 2.7 and Python 3.3+. Firebase Admin Python SDK is also tested
+on PyPy and Google App Engine environments.
+
+
 ## Documentation
 
 * [Setup Guide](https://firebase.google.com/docs/admin/setup/)
 * [API Reference](https://firebase.google.com/docs/reference/admin/python/)
 
+
 ## License and Terms
 
+Firebas Admin Python SDK is licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
 Your use of Firebase is governed by the
 [Terms of Service for Firebase Services](https://firebase.google.com/terms/).