Add default sublime text project file

You could open this project file to see only relevant files and folders
for a default setup
Prefer Sass and CoffeeScript over plain CSS and JavaScript

* Rename app.{css,js} -> application.{scss,coffee} (Mixture’s
precompilers should take care of assets compilation)
* Include correct assets in main layout
Add bunch of comments

Nothing serious, really.
Add missing new line at end of file

;-)
Add initial stylesheets

* Normalize
* Bourbon
* Bitters
* Bourbon Neat