Updated rails to 4.1.8
Renamed public scope to communal to avoid class method clash
Upgraded ruby to 2.1.5
Use new travis env for faster tests and bundler cache
Merge pull request #168 from andrew/master

Updated rails to 4.1.8
Merge pull request #169 from andrew/ruby-upgrade

Upgraded ruby to 2.1.5
Merge pull request #170 from andrew/travis-update

Use new travis env for faster tests and bundler cache