* cleanup threading
* user lists to lightweight collections
adding json for now so our build works.
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.