Flash Dash unleashed

Just added the default structure for Flash Dash app. We have a lot of todos:

1. Add more details in README.md or write `wiki` sections
2. Enhance React-Router
3. Integrate PhantomCSS for visual tests
4. Create a github page
5. _TBD_

cc: @bshyong please review my changes. It's still premature, but it's a starting point :+1: