The communication server uses a simple format so that clients for languages
that are unable to interface with C can be easily developed. In addition,
telnet can be used to connect directly to the communication server to 
test it and to "override" commands from a bad control program.

The communication server listens to port 47718 by default.

The communication server expects a message of the form:
    id left_speed right_speed\n
(Note: extra whitespace (tabs, spaces, newlines) is ignored)

Where:
   id represents the id number of the desired robot's radio turret and 
   should be an integer in [0,31]

   left_speed is the speed to set (in units of 0.78 cm/s) for the left
   motor and should be an integer in [-126,127]

   right_speed is the speed to set (in units of 0.78 cm/s) for the right
   motor and should be an integer in [-126,127]

On success, the server will respond with:
    ok\n

On an error, a textual message will be returned.
If the error is the result of a bad message format, 
the server will respond with:
    Invalid Command\n\0
If the message's content is invalid it will respond with one of
the following:
    ID out of range\n
    Left Speed Out of Range\n
    Right Speed Out of Range\n
If the server is unable to open a serial port it will respond with:
    Unable to open serial port\n