crt tweaks to motion_models

Committing locally before merging Eric’s changes from github.
Merge branch 'nkcdev' of https://github.com/ctwardy/mapscore into nkcdev

Merged Eric’s changes with mine, and tweaked until it ran. Impedance
raster is still uniform.

Conflicts:
	arc-models/motion_model.py
Added extra prob checks (print) and fixed counts.