FollowMeTag
-----------
This sketch is for the 'tag' that the car will drive toward. It requires a ublox GPS module
that has been set up to send only the POSLLH message in binary format.

GPSToI2C
--------
This sketch is for the 'helper' arduino on the car. It requires a GPS module giving standard
NMEA sentences, and provides access to important location info on the I2C interface.

CarRecvDrive
------------
This sketch is the main controller of the car. It reads GPS and compass info from I2C and
writes to two servos to control the car. Normally the first bit of the 'switches' member of 
the radio data packet would be used to switch between manual control and auto control, but
I had it hardcoded to always use auto control in this case.



Note that you could probably use the ublox binary protocol on the main controller of the car
to get the GPS information directly instead of using a second 'helper' arduino. I'm just using
the two arduinos together because I have them already set up on the car and the code works
already. If I was starting from scratch I would try using a single arduino on the car, and get
GPS info using the same code that the 'tag' sketch uses.
