category tests now all passing - need to ensure that infinite scroll is properly wrapped in tests

Conflicts:
	app/controllers/organizations_controller.rb
	app/models/organization.rb
	spec/models/category_spec.rb

passing user abilities spec; broken controller specs

passing user ability spec; search is broken

mirroring the auth exceptions in the old before_filter
run this script to see failing features that I recommend modifying
cleaning up user abilities spec some
removing junk cancan directory