- Move the low level socket code into the PyrasiteIPC for re-use throughout
  our GUI and payloads
- Create an 'unreliable' data transfer mode that lets payloads, like
  the reverse shells, work properly with netcat on the other end.
  By default, the IPC will prepend a length header to the data, to
  ensure reliability.
- Pull our ReverseConnection and ReversePythonConnection out into a new
  pyrasite.reverse module