.nuget packages downloaded
Added Classes for the Database, Comments, Video, User, course. Added a context for roles.
Merge branch 'backend' of https://github.com/thelias/Lectio into backend

Conflicts:
	LectioServer/LectioServer/bin/Microsoft.Owin.dll
	LectioServer/LectioServer/bin/Newtonsoft.Json.dll
	LectioServer/LectioServer/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
	LectioServer/LectioService/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache