USB: set attributes for bus power, no remote wakeup

this may help the USB bus providing the full 500mA on some systems
Merge branch 'multirotor'
Prevented an analog airspeed corner case from happening
Reworked how start scripts work, relying on io detect now
Added IO detect command to be smart about what to start before actually doing it
Fixed IO detect message
ROMFS reshuffling / cleanup, in sync with QGC
Removed non-helpful verbosity
More graceful startup messages
param MC_RCLOSS_THR removed from scripts
Grab UTC time from GPS
Merge pull request #16 from tstellanova/set_realtime_from_GPS

Grab UTC time from GPS
sdlog2: "landed" flag logging
Add defines for RC15 params (16 channels total)

minor cleanup of rc sanity check code
Merge pull request #18 from tstellanova/add_rc15_param

Add defines for RC15 params (15 channels total)
Merge branch 'multirotor'
Made low/critical warnings consisting
Changed RGBLED behaviour, breathe mode when disarmed and ready to arm
Merge pull request #19 from cvg/rgbled

RGBLED changes
position_estimator_inav: critical bug fixed