Remove some unused files
Use TCP sockets instead of raw sockets

Server connects to ssh
Client TCP Server forwards first packet over UDT
Server forwards first packet to ssh
Introduced UDTServic to asynchronously send/rcv UDT, ...

Merged UDTSender with UDTReceiver as UDTSocket
Switched UDT to rendezvous mode
Server strangely exits upon establishing UDT connection
Server sends udt data back instead of shutting down after UDT connect
UDTService and UDTSocket polls/receives/sends correctly
Extracted UDTEventPoller from UDTService