Add group class ref #20
Merge remote-tracking branch 'origin/dev' into Biber/feature/groups
Modified .travis.yml for heroku-support.
Repaired .travis.yml for use with Heroku
Merge branch 'Biber/feature/groups' into dev
Modify groups view spec ref #20
Merge remote-tracking branch 'origin/dev' into Biber/feature/groups
Merge branch 'Biber/feature/groups' into dev
Modify .travis.yml for heroku