HandleCurrentMessageLater on workers causes workers to send extra ready messages, fixes #851

Conflicts:
	src/NServiceBus.Core/Distributor/Config/WorkerInitializer.cs
	src/NServiceBus.Core/Distributor/MsmqWorkerAvailabilityManager/MsmqWorkerAvailabilityManager.cs
	src/NServiceBus.Core/Distributor/ReadyMessages/ReadyMessageSender.cs
	src/NServiceBus.Core/Unicast/UnicastBus.cs
SendLocal on workers was causing workers to send extra ready messages, closes #806

Conflicts:
	src/NServiceBus.Core/ConfigureDistributor.cs
	src/NServiceBus.Core/ConfigureMasterNode.cs
	src/NServiceBus.Core/Distributor/Config/WorkerInitializer.cs
	src/NServiceBus.Core/Unicast/UnicastBus.cs
HandleCurrentMessageLater needs to send message back to distributor if endpoint is a worker, closes #851

Conflicts:
	src/NServiceBus.Core/Distributor/ReadyMessages/ReadyMessageSender.cs
	src/NServiceBus.Core/Unicast/UnicastBus.cs
Removed LegacyEndpointRouter has it was not being used, this fixes #878
Invalid types were being mapped to addresses, closes #866

Conflicts:
	src/NServiceBus.Core/Unicast/Config/ConfigUnicastBus.cs
Ensuring a product update is done correctly.
Enable WCF hosting in unobtrusive mode, fixes #889

Conflicts:
	src/NServiceBus.Core/Hosting/GenericHost.cs
	src/NServiceBus.Core/Hosting/Wcf/WcfManager.cs
Merge branch '3.3.4'