Bootstrap based framework

- Changed the CSS framework to be bootstrap based
- Ported core framework, footer, top navigation, sign in dropdwon (not autosuggest yet) to new framework
- Made a local copy of OpenSans
- Imported FontAwesome for icons
- Split up OAE CSS into bootstrap, base, components and skinning
- Added example skin for Georgia Tech
- Converted validation API to use Bootstrap styles and classes
- Removed unused libraries
- Removed widgets that will not be used the first production instance