Airframe config and autostart for the TBS Discovery Long Range
Up the min PWM slightly.
Merge pull request #1506 from sjwilks/tbs_endurance

Airframe config and autostart for the TBS Discovery Long Range
fw pos ctl: make loop performance counter more meaningful
fw pos ctl: compile with -Os
Merge pull request #1508 from PX4/fwposl1Os

fw pos control: compile with -Os
Merge remote-tracking branch 'upstream/master' into timesync