Remove 30 sec wait prior to endTime

Probably an artifact..
Use one-shot isCutdown flag for cutdown notice only.

Was causing cutdown to only run once, sending "C" for only 200 ms, not
long enough to catch remote when awake.
Get GPS data regardless of cutdown time

Was an else block on cutdown time condition.
Merge remote-tracking branch 'origin/flight'

Conflicts:
	CutDownBase.ino