Added [prefix] option for time-ago directive
Fixed people selector not binding to scope properly/ removed custom maxItems (defaults in directive already exist)
Added Add button for instructors/courses
Removed needless type declaration for student add button
Major change: created angular-sharepoint module

- Created independent library
- Created _utils.compress()/decmpress() wrappers to dynamically handle
RawDeflate/LZString or no compression library
- Created _utils.beforeSend() to pre-process data before sending to
SharePoint w/create or update
- Finished create function & began doing operational tests
- Added lookup cacher for people (for the life of the application/no
persistent storage used) to speed up UserInformationList lookups
- Removed most of the FTSS references, still have a couple to clean up
Refactored edit/update controller functions to handle SharePoint.create() with the same code--very DRY