Re-changed ground plane estimation to automatic as default.
Re-changed ground plane estimation to automatic as default.

OpenPTrack/open_ptrack,chanbrown007/open_ptrack,OpenPTrack/open_ptrack,chanbrown007/open_ptrack,chanbrown007/open_ptrack,team-diana/swissranger_camera,team-diana/swissranger_camera,OpenPTrack/open_ptrack