Added the wysihtml5 stylesheet file to application.css using `@import` 

At first I was confused why you hadn't just used `require_tree .`, then I checked the asset pipeline documentation and found this:

>If you want to use multiple Sass files, you should generally use the Sass @import rule instead of these >Sprockets directives. Using Sprockets directives all Sass files exist within their own scope, making variables >or mixins only available within the document they were defined in.

Guess that's why? Also, why you individually include the `ie` and `print` stylesheets in the application layout?