added WampHost.Unregister(IWampRpcMetadata)
removed DynamicRPC implementation

Conflicts:
	src/WampSharp/Rpc/Server/DynamicRPC.cs
SessionCreated/Closed are now proper events on WampListener and WampHost
removed CallInvoked
Refactored session event handlers new code
Merge branch 'dynamicRPC' of https://github.com/vvvv/WampSharp
Unregister now gets a method and not metadata
Forgot to commit these
Merge remote-tracking branch 'upstream/master' into develop

Conflicts:
	src/WampSharp/Api/Server/WampHost.cs
	src/WampSharp/Rpc/Server/WampRpcMetadataCatalog.cs