Added the WeakAction, WeakFunction and WeakEventHandler helper classes
Added some missing EventHandlerExtensions primitives
Added the IApplicationProfileService interface and implementation
Added a few more dialog launchers to the IDeviceSettingsService
Renamed WeakEventHandler to WeakEventSubscription
Removed SafeBehavior<T> class
The ApplicationBarBehavior and MultiApplicationBarBehavior can now only be attached to a PhoneApplicationPage
Added the NamescopeBinding helper class