Added few checks to handler to see if they are supported or disabled by device.
Changes to ItemViewModel to support preserving and restoring page state.
Page state is restored when the app is tombstoned.
App state preserve and restore.
Handlers refactoring.
Added new view models for each pivot item.
View model renaming etc.
Improved MVVM folder structure.
Application and page state related changes. Lots of stuff still to be done.