restored 42 alt hold code
removed throttle timer, replaced with safer constant
increased alt control range
reformatted nav_rate calls
removed unused simple mode defines
set alt hold home to 10m
tuned down rateP to .13 from .14 for broader application.
Added WP to Loiter_time so you can spec a specific location in the planner
added new Navigation alg. Should perform better (doesn't rely on 45° flow fields like last one)
Added "Jump" counter so missions don't get overwritten in flight.
removed I term by default for Rate pitch and roll