c3_trajectory_generator: accept actions while killed to prevent them from being queued and applied immediately when unkilled
object_finder/sim: work on mesh targets
object_finder: deal with color channels that don't yield any information

could be done better, e.g., by projecting every pixel's color onto vector
between colors and calculating correlation with resulting single channel images
legacy_vision: pool tweak to fix pipe finding due to paint chipping off
mission_core: stop sub(!) after missions are done