Changes to nav and logger before launch.
Merge pull request #43 from ddeo/master

Test harnesses for drive is changed. Rudder control tested. Rudder init was merged with the drive init.
Merge branch 'nav-logger-final'
Mavlink updated for new messages, and fixed errors within Mavlink.
Merge pull request #44 from BananaSlug/compas

Mavlink updated for new messages, and fixed errors within Mavlink.
Logger, navigation, and drive tested and working.
Merge branch 'master' of github.com:dagoodma/sdp
Merge branch 'land-test'
Test harness for individual actuators