Update show-routes to handle Gem::Version object
Tolerate difference in Mongoid output w/r/t _type
Omit non-matching models from --grep output
Work on method naming

(Also switch from #+= to #push)
Convert to Pry::ClassCommand

(Helps for live reloading)
Add Mongoid spec to regain coverage
Always use color, even with --grep
Update spec to match inverted output