improvements to booking
Merge branch 'master' of https://github.com/ProjectGroep1/Joetz-Windows

Conflicts:
	ProjectenIII/JoetzPhoneApp/Views/BookingAddParticipant.xaml
	ProjectenIII/JoetzPhoneApp/Views/BookingAddParticipantCreate.xaml.cs
	ProjectenIII/JoetzPhoneApp/Views/BookingParticipants.xaml
	ProjectenIII/JoetzPhoneApp/Views/CampDetail.xaml.cs
Merge branch 'master' of https://github.com/ProjectGroep1/Joetz-Windows