Enabling navigator, does not do anything useful yet
Fix the direction of the override switch for the new state machine
easystar startup script: load mixer from sd-card if available
Merge pull request #427 from thomasgubler/sd_mixer

easystar startup script: load mixer from sd-card if available
Hotfix: Improved file test
Merge branch 'master' of github.com:PX4/Firmware
tone_alarm: add GPS warning tone
Better voltage scaling for Iris
Start digital airspeed sensors as default
Hotfix: Ensure that a minimum of 10 degrees pitch is set on takeoff
Merge branch 'master' into geofence