Implement
Merge branch 'master' of https://github.com/WadeOne/EasyTeach

Conflicts:
	EasyTeach.Web/Controllers/QuizController.cs
Merge branch 'master' of https://github.com/WadeOne/EasyTeach
Implemented question adding in service
Merge remote-tracking branch 'origin/master'
Merge branch 'master' of https://github.com/WadeOne/EasyTeach

Conflicts:
	EasyTeach.Core/EasyTeach.Core.csproj