navigator: force takeoff if first mission item is not takeoff and vehicle landed
Reboot if IO update startup fails on first try
ESC calib: low PWM value was not set
Merge pull request #573 from julianoes/hotfix_esc_calib

ESC calib: low PWM value was not set
navigator: takeoff and mission fixes
Merge master into navigator_new
navigator: takeoff fixes
navigator: AUTO_READY nav state added, RTL implemented properly
Merge branch 'navigator_new_fw' into navigator_new