Get the latest Umlaut :gem: from rubygems and lock it in. The :gem: has been release with the changes we need, we don't need to point to the latest revision from GitHub anymore.
Bump version of sass gem with this fix: https://github.com/nex3/sass/pull/1171
Point to the qa branch of the Exlibris::Nyu :gem: and lock it in so that we point to Aleph stage in https://qa.getit.library.nyu.edu
Refresh users every hour in qa