Merge remote-tracking branch 'origin/Development' into maaak
FIX: leftside menu
FIX: UnitOfWork is not a singleton
Added Security Service
Merge remote-tracking branch 'origin/Development' into maaak

Conflicts:
	BinaryStudio.PhotoGallery.Database/DatabaseInitializer.cs
	BinaryStudio.PhotoGallery.Domain/BinaryStudio.PhotoGallery.Domain.csproj
	BinaryStudio.PhotoGallery.Domain/Bootstrapper.cs
	BinaryStudio.PhotoGallery.Domain/Services/IPhotoService.cs
	BinaryStudio.PhotoGallery.Domain/Services/PhotoService.cs
	BinaryStudio.PhotoGallery.Web/Views/Shared/_MainLayout.cshtml
FIX: lib installation
FIX after Merge. It is corrected by Vilian and Maaak