Added method to compute heading between two gps coordinates, and added a structure for the gps points
Merge branch 'master' of https://github.com/QMAST/sailcode
Merge pull request #22 from rkevingibson/master

Added method to compute heading between two gps coordinates, and added a...
Added support to send a new direction to the arduino. Made minor change to sketch.ino
Merge pull request #23 from rkevingibson/master

Added method to update direction on the Arduino, and reworked arduino code to allow for this.
Added code to main.cpp for parking lot testing