major update for r6335

+ added support for new RPC calls (not everything is fully implemented
therefore not tested)
+ rewrote function to read from stream -> no need for "read speed"
anymore
+ updated .proto files
+ updated SSH.NET and protobuf-net
* cleaned up a bit and added some comments
major update for r6335

General:
* renamed Settings.cs as LoadSaveHandler.cs
+ added Settings.cs ( in \ and not \Tools\ ) which contains some global
settings

Chat:
* renamed group chat as braodcast
+ added a max length for chat history ( see Settings.cs )

Peer:
- removed _pendingPeerRequests ( not needed anymore ->
RequestSystemAccount does the job now (not implemented yet; see below))

Known Problems:
- the Client does not know the RS server identity since
RequestSystemAccount is not implemented on the server side - i hope
drBob will fix this soon
- some changes may need more debugging to find possible mistakes ( see
above)