bump dor-services to 3.x, and other gem updates
add ci as the default rake task.
move update_users action from catalog to admin controller.
refactor get_fedora_object logic.
use cancan authorize! instead of the deprecated enforce_access_controls
replace custom signin controller with an override of the devise SessionController
use devise's authenticate_user\! filter to authenticate users on protected actions
update tests to use the warden test helpers.
we're not using many of the routes from blacklight; just white-list the ones we do use.
refactor index logic.
refactor hydrus items index logic
remove not-very-good test for get_attributes