Panels, Button Groups, Grid additions, and documentation cleanup, TinyMCE buttons

Added the following shortcodes:
* Panels
* Button Groups

Added Offset, Push, Pull for Grid

Added TinyMCE buttons for Button, Alert, Label, Badge, Icon, Panel

![screen shot 2013-09-10 at 6 14 10 pm](https://f.cloud.github.com/assets/2457670/1118851/e6ebf5fe-1a66-11e3-9629-411675b5d81a.png)

Re-arranged and re-named some documentation, fixed Grid documentation to match actual code, and code to match documentation.