[Katello] Bastion asset updates

As of today, we have changed the way our UI engine handles assets by
including all of them into our source control for now. This change is due
to restrictions with building and packaging but should make basic
development of Katello easier on most developers. No extra setup will be
required unless working on the UI itself and needing to run tests and
linting locally. We are still using Bower to manage asset versions and
provide tooling around Bower to help manage updates please see how to
handle adding or updating dependencies with the changes

If you pull latest master, feel free to remove the 'dev-components'
directory under 'engines/bastion/vendor/assets'.