Fix has_many relationshisp CardManifest -> Panes
add console utility methods `add_pane(name)` `pane_names` and `remove_pane(name)`
http code 401 when attempting stackover flow oauth but not logged in to glazier
update spec
Merge remote-tracking branch 'origin/master' into card-storage

Conflicts:
	app/controllers/cards_controller.rb
	app/models/pane_type.rb
	spec/controllers/cards_controller_spec.rb