Refactored prependDriver.

Prepend driver was made more readable.
colorPicker has small change. Added preventDefault.
Created errors partial to handle error reporting on app.

Removed error reporting from -input partial and added it to _errors.
Specified alert in post controller to send error messages over.
Added ability to display specific error by parsing modified alert flash.
Added container div around yield.
Added basic CSS and removed outdated sliderDriver.