Command center working. Fixed Xbee timer #.
Checkoff day. Changed height for bridge height.
Re-enabled Xbee in Compas.
TEST Not working.
Last minute sonar code changes.
Added new GPS messages to the XML, code still needs to be integrated with them
GPS error messages integrated into MAVLINK
Merge pull request #31 from sdajani/master

Compas ready
Merge pull request #32 from BananaSlug/new_gps_messages

New gps messages
Navigation documentation update, new encoder model.
Merge branch 'nav-docs'
Encoder model and ComPAS schematics.
Merge branch 'sonar' of https://github.com/BananaSlug/sdp into sonar
Added Atlas project and Drive module.
updateHeading function implemented, Controller implemented digitally and Ucmd is utilized in a 1:3 ratio when governing PWM duty cycles for differential motor drive
Wrote updateHeading for Drive module.

updateHeading function implemented, Controller implemented digitally and Ucmd is utilized in a 1:3 ratio when governing PWM duty cycles for differential motor drive
Added drive model and march newsletter.
Updated the Controller code to account for corner cases, it is more robust and will take the optimal path to the desired waypoint
Merge branch 'master' of git://github.com/dagoodma/sdp
Fixes to march newsletter.