added possibility to dynamically register RPCs
added WampHost.Unregister(IWampRpcMetadata)
removed DynamicRPC implementation

Conflicts:
	src/WampSharp/Rpc/Server/DynamicRPC.cs
Merge branch 'dynamicRPC' of https://github.com/vvvv/WampSharp
Unregister now gets a method and not metadata