Added ability for turtle router to take client services

- new class RsTurtleClientService, from which should inherit the services
- turtle serialisation takes client services for deserialising
- added a client to p3turtle::monitorTunnels()
- added a generic turtle item to pass on arbitrary data

Moved ftServer as a subclass of RsTurtleClientService. 
- moved file transfer items that inherited from RsTurtleGenericTunnelItem into a separate file
- moved deserialisation triage into ftServer
- moved sending/receiving methods in ftServer (much less code, much more consistent!)

One bug remains: the TR cannot work as a server.

Changes should be 100% backward compatible.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-GenericTunneling@6293 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/serialiser/itempriorities.h

@@ -23,6 +23,10 @@
  *
  */
 
+#pragma once
+
+#include <stdint.h>
+
 // This file centralises QoS priorities for all transfer RsItems. 
 //
 const uint8_t QOS_PRIORITY_UNKNOWN                    = 0 ;