Domain skeleton
Domain comments
Updated ignore file
Removed project
Test version for location tracking.

Taken parts of example:
http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj662935(v=vs.105).aspx
Test version where GPS handling in domain.

Also made handler available to can handle things like UI updates in the
App layer.
Moved things to an Exercise page.
Merge branch 'use-case-3'