elementary CSS 2.2.0

* Updated toggle icons to reflect changes in [elementary GTK 3.3][1]
* Added infobars from [elementary GTK 3.3][1]
* Updated icon names to be more semantic
* Put font styles in its own scss file
* Added hover state to navigation links
* Fixed anchor button padding

[1]: http://elementaryos.org/journal/elementary-gtk-theme-33-released#node-280137