Changes

Multiple PVG fixes

1. don't do TERMINAL_RCS in anything other than the last stage
2. end the TERMINAL state if there's no thrust
3. skip the current stage in the stage dV iterations in the glueball
   if it is coasting and is coast after (not coast before).

plus a bit of mass costate removal

Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>
 (commit: 8b1fb75)