Simplify the travis build to replace separate gemfiles with a env variable for the rails version to use
Merge pull request #978 from projectblacklight/travis-build

Simplify travis builds
Add bookmark count to nav button
Merge pull request #980 from avalonmediasystem/feature/bookmark_count

Feature/bookmark count
bump to 5.7.0
Support the display of constraints in the order in which they were selected