Cleanup

+ Added the class SimpleRepository
+ Added comments to the existing repository classes
* Simplified the existing repository classes
* Commented the model classes
Merge branch 'master' of https://github.com/ElectricCoffee/Project-Late-2013-ASP-REST

Conflicts:
	REST Service/REST Service/Models/Student.cs
	REST Service/REST Service/Repositories/BookingRepository.cs