Created bookings list view and viewmodel
Modified MainViewModel to only load most of the ViewModels after logging in
Created PageViewModel with useful properties and common commands for all view models to inherit from, styled buttons and hooked up navigation between screens
Added loading bar to whole app, show/hide using LoadingMessage, and made login process asynchronous
Merge branch 'master' into wpf
Update GetUserOwnBooking call, cleanup unused view code-behind
Rename and refactor messaging used for changing pages
Created PageViewModel base class for view models with views
PVM has IsCurrentlyShown property, and NavigatingTo/From events to perform actions on view model when changing pages
Refactored ViewModels to use OnNavigatingTo to refresh data
Also made custom Message classes derive from MessageBase
Cleaned up unnecessary code
LoginPage: moved testing password value into code behind with compile flags
Refactored BookingsCreateViewModel to use OnNavigatingTo for refreshing data
Removed a XAML error
Wired up BookingList and BookingCreate pages for Edit Booking button
Refactored ChangePageMessage to allow changing to a given view model instance
Rename BookingsCreate to BookingsForm
Cancel Booking functionality