Added package name ProtoBetty to protobuffer message file.
Reason is to better identify types and package name can be implemented
easier in other languages (c++ as namespace).
added printer for screen outputs sended over print channel by zmq.
added gettimestamp for protobuf timestamp
Added output_printer to Makefile
Added channel for print_output
Defined protobuf message for printing outputs.
Made simulator ready to send debug info over zmq