docs(readme): Add demo gif to readme (#10)

README.md

@@ -1,7 +1,11 @@
-<img src="logo.png?raw=true" alt="Playroom" title="Playroom" width="292" height="50" />
+<img src="images/logo.png?raw=true" alt="Playroom" title="Playroom" width="292" height="50" />
 
 [![Build Status](https://img.shields.io/travis/seek-oss/playroom/master.svg?style=flat-square)](http://travis-ci.org/seek-oss/playroom) [![npm](https://img.shields.io/npm/v/playroom.svg?style=flat-square)](https://www.npmjs.com/package/playroom) [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg?style=flat-square)](https://github.com/semantic-release/semantic-release) [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg?style=flat-square)](http://commitizen.github.io/cz-cli/)
 
+---
+
+<img src="images/demo.gif?raw=true" alt="Playroom Demo" title="Playroom Demo" />
+
 Simultaneously design across a variety of themes and screen sizes, powered by JSX and your own component library.
 
 Playroom allows you to create a zero-install code-oriented design environment, built into a standalone bundle that can be deployed alongside your existing design system documentation.