ADD: GSM positioning server for TangoGPS!

ADD: GSM positioning server for TangoGPS!

Added new file: gsmpos_server.py
Implemented: simple server using sockets to fake standard
NMEA output of gpsd. Gets GSM fix, and outputs it as GPS data.

Running: set tangoGPS to localhost/2940, currently hardcoded
port. Start up server, if connects to dbus then it will start
its socket - tangoGPS will automatically connect to it. The
NMEA sentences sent to tangoGPS are shown n the terminal. Stop
program with Ctrl-c, should do graceful exit (also if there's
an exception)

If running just to check output then start server, connect to
socket (e.g. nc localhost 2940) and send a single character to
make it start the looped reply.

Currently only one connection is allowed to the server.