added possibility to dynamically register RPCs
added SessionCreated, SessionClosed and CallInvoked to WampListener and exposed the Listener on the WampHost
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