Fixed InteractionMessenger around asynchronous message sending.

Added other overload of GetResponseAsync method.
bugfix: not callbacked in GetResponseAsync on .NET 4.5.
ResponsiveInteractionMessage.Response property might become empty by order of triggers.
Fixed InteractionMessenger around asynchronous message sending.

Added other overload of GetResponseAsync method.
bugfix: not callbacked in GetResponseAsync on .NET 4.5.
Ignore empty response in InteractionMessageTrigger.

ResponsiveInteractionMessage.Response property might become empty by order of triggers.
Merge pull request #3 from karno/pullreq_messenger

Fixed InteractionMessenger around asynchronous message sending.
Fixed stability problems in ReadOnlyDispatcherCollection.
Merge branch 'pullreq'
Merge branch 'pullreq_messenger'
Merge branch 'pullreq_trigger'
Fixed ViewModelHelper.
Merge pull request #4 from karno/pullreq_trigger

Ignore empty response in InteractionMessageTrigger.
FIxed MemoryLeak problem in EventListener.
Livet1.06 Release.
LivetCask 1.06 Release.
Added Codebehind Support.
Merge branch 'master' of git://github.com/ugaya40/Livet

Conflicts:
	.NET4.0/Livet(.NET4.0)/ViewModelHelper.cs