Setup project structure

Project structure generated with [activator](https://www.playframework.com/download).
I did nothing, I just cleaned some useless stuff and put a simple Less file to see how the compiler goes :cat: 

In order to test this set up, you simply need to run : 
`activator run`

Dependencies are gonna be downloaded... and *tada!*
Go to `localhost:9000` and dance:dancer: 

@ojbruce, tell me if it's working for you :)