Added support for Play 2.4 in version detection
Added support for Play 2.4 in version detection

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