metadata set fix
* cleanup threading
* user lists to lightweight collections
adding json for now so our build works.
Add timeStamp to RecordMetricAsync, improve permissions handling and API uniformity, make a few params optional.
Fix blowing the stack in getconstructor
* Fix up windows support
* add config for windows phone.
Add Windows Phone 8.1.
Clean up sample directories, use Xamarin components for JSON.NET.
Merge branch 'user-lists' of https://github.com/BuddyPlatform/Buddy-DotNET-SDK

Conflicts:
	Src/BuddyClient.cs
	Src/Collections/BuddyCollectionBase.cs
	Src/Collections/UserListCollection.cs
	Src/Objects/UserList.cs
Fix up projects.
Update license.
Fix Xamarin projects.
Fix Xamarin Android release path.
merge master->develop