Fix a TODO where DataSerializer and DataDeserializer string methods did not use VLE packing, but only serialized the string length as a u8. Now VLE is used instead. WARNING: This breaks protocol compatibility with earlier kNet versions.
The function NetworkServer::CloseListenSockets() was never being called: rename it to CloseSockets() (in UDP mode listen socket is the same as the connection sockets) and call it at destruction time for cleanup. Fixes #21.
Clean up build warnings.