update fontawesome to 3.1.1

@brzaik, I was hoping to upgrade the fontawesome to 3.1.1 so we could take advantage of the additional icons and features.  Specifically, the quotes at this time (for the next PR I'm sending your way.) Can you review this and merge if it is ok?  

Basically all I did was incorporate your pathing line and change all the `icon-` selectors to `ficon-` selectors.  So the ui-icon stuff didn't get re-implemented, and there's a bit more classes in this file.  The source I worked with came from the [fontawesome download's](http://fortawesome.github.io/Font-Awesome/assets/font-awesome.zip) css file.

A quick tour through the app didn't show any problems, but I'm sure I didn't have 100% coverage.  Thanks.