Broke tight coupling between the CategoryVM and the CategoriesListViewModel.

Added debgger friendly code so we get better errors when a view model cannot be resolved.

Created an app level nav service.  The idea here is that it will have a more semantic api, "Show This" "Shwo that".  It will know how to create the pages and show the content.
Still trying to clean up navigaation.  It's a work in progress.
Playing with AppCompat
ignoring the component
new project to play with layout animations.
Playing around with layout transitions.  Easier than I had thought.
More fun with anime.
baby steps to caching data.
Akavache with droid is setup.
moving the mock cache to the core project so it can be used by other platforms before their implementtions are created
Adding cache for windows phone.
Enable logging in to be sticky
1.) actually wiring up windows cache.
2.) Adding logout ability
3.) Adding app/action bar menu to logout
Adding icon to actionbar for droid. not a great one, but hey, it does the job.
Added a splash screen.
introducing a delay.