Added a new gem to travis setup
Added a new gem to travis setup

yannickdeturck/heroku-buildpack-scala,Scalingo/scala-buildpack,agideon/heroku-buildpack-scala,yannickdeturck/heroku-buildpack-scala,heroku/heroku-buildpack-scala,heroku/heroku-buildpack-scala,Scalingo/scala-buildpack,agideon/heroku-buildpack-scala