Merge pull request #15 from BananaSlug/xbee_mavlink

Xbee mavlink
Added serial logger. Has one error.

Unexplainable error showing up in data character from serial.read(1):
Error: Sent byte was not acknowledged
Finished logger. Working on thermal.
Finished and merged serial_logger.
Finished thermal MATLAB code.
Improved GPS scirpts.
GPS convergence test. Want mean squared sum now.
Added back lost GPS data from Feb-05.
Thermal,baro,and solidworks changes.
Merge pull request #16 from sdajani/therm_solidw

Thermal,baro,and solidworks changes.
Finished GPS convergence scripts.