Lot of scripts cleanup. Parsers.py now can read in the OSSOS Version releases.
Additional factorising and revamping to produce plots. Still can't get known MPC objects to plot on the sky location plots which is weird.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/ossos-pipeline/planning/plotting/sky_location_plots.py
Merge remote-tracking branch 'origin/master'
Closes #326.