don't write database.yml for rails 4
don't write database.yml for rails 4

sanemat/heroku-buildpack-ruby-tachikoma,sstelfox/buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,bskyb-commerce/help-heroku-buildpack,tdenovan/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,sgnpa/heroku-buildpack-cas,dtao/teeny-buildpack,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,pkgr/buildpack-ruby-precise-old,CPPWind/ruby-buildpack,Jonty/ruby-buildpack,orlando/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,reesio/heroku-buildpack-ruby,AdStage/heroku-buildpack-ruby,codykrieger/heroku-buildpack-jekyll,amaltson/heroku-buildpack-ruby,scottatron/moc-buildpack,michaelphines/alexa-nest,packetmonkey/heroku-buildpack-ruby,wakermahmud/heroku-buildpack-jekyll,takii/heroku-buildpack-ruby,awebneck/heroku-buildpack-canvas,electricobjects/heroku-buildpack-ruby,dtao/teeny-buildpack,derrek/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,hausdorff/heroku-buildpack-ruby-jekyll,diasks2/heroku-buildpack-mecab,icelab/heroku-buildpack-ruby,teodor-pripoae/heroku-buildpack-ruby,mattwalters/heroku-buildpack-ruby,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,dlorson/gentle-buildpack,righi/instacart-heroku-buildpack,Altoros/ruby-buildpack,cloudn/buildpack-ruby,travis-ci/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,dieze/heroku-buildpack-ruby-hooks,bskyb-commerce/ruby-buildpack,qnyp/heroku-buildpack-ruby-bower,stolt45/heroku-buildpack-ruby-with-sqlite3,mintybit/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,ibmdb/db2rubybuildpack,hausdorff/heroku-buildpack-ruby-jekyll,zidekmat/buildpack-ruby,jeremyvdw/heroku-buildpack-ruby-jekyll,pkgr/buildpack-ruby-precise-old,Scalingo/ruby-buildpack,tomwolfe/heroku-buildpack-gsl-ruby,mattwalters/heroku-buildpack-ruby,mrhenry/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,ChefSteps/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,cordata/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,davidjrice/heroku-buildpack-couchbase-ruby,musicglue/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,ltrademark/heroku-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,beydogan/ruby-buildpack,musicglue/heroku-buildpack-ruby,bskyb-commerce/help-heroku-buildpack,mrhenry/heroku-buildpack-ruby,dleavitt/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,Scalingo/ruby-buildpack,iamjarvo/ruby-buildpack,jonseaberg/heroku-buildpack-turbo-sprockets,barakav/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,erintherad/heroku-buildpack-ruby,ndbroadbent/heroku-buildpack-turbo-sprockets,hatofmonkeys/ruby-testing-buildpack,travis-ci/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,ruby/heroku-buildpack-www-ruby-lang,swipesense/heroku-buildpack-ruby,stefansundin/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,hpcloud/heroku-buildpack-ruby,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,cordata/heroku-buildpack-ruby,zoomer/heroku-buildpack-ruby-bower,phusion/heroku-buildpack-ruby,HYPERHYPER/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,shuber/heroku-buildpack-ruby,fgbreel/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,adaptivelab/heroku-buildpack-adaptivelab-website-2,schu/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,stolt45/heroku-buildpack-ruby-with-sqlite3,Git-Host/prelang-buildpack,ilpoldo/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,beydogan/ruby-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,WilliamDenniss/heroku-buildpack-ruby-imagemagick,bskyb-commerce/ruby-buildpack,Altoros/ruby-buildpack,fgbreel/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,dlorson/gentle-buildpack,recursecenter/heroku-buildpack-ruby,progrium/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,Jonty/ruby-buildpack,travis-ci/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,0x00evil/heroku-buildpack-ruby,scottatron/moc-buildpack,ericboehs/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,hpcloud/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,diasks2/heroku-buildpack-mecab,hatofmonkeys/ruby-testing-buildpack,sky-uk/ruby-buildpack,bwaite-jaroop/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,stefansundin/heroku-buildpack-ruby,redhotvengeance/heroku-buildpack-deep-thought,daltonrenaldo/heroku-buildpack-ruby,ablease/custom-buildpack,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,cloudn/buildpack-ruby,cloudfoundry/ruby-buildpack,darron/heroku-buildpack-ruby-jekyll,wolfoo2931/heroku-buildpack-ruby-2a352ae,takii/db2rubybuildpack,takii/db2rubybuildpack,qnyp/heroku-buildpack-ruby-bower,jonasoberschweiber/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,sky-uk/ruby-buildpack,bskyb-commerce/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,wakermahmud/heroku-buildpack-jekyll,AdStage/heroku-buildpack-ruby,jayshreeanand/heroku-buildpack-ruby,WilliamDenniss/heroku-buildpack-ruby-imagemagick,jumptvs/BP_Ruby,andycroll/heroku-buildpack-jekyll,wolfoo2931/heroku-buildpack-ruby-2a352ae,ActiveState/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,vhx/heroku-buildpack,mperejda/heroku-buildpack-ruby,jgarber/heroku-buildpack-ruby-octopress,engineyard/heroku-buildpack-ruby,michaelphines/alexa-nest,tomwolfe/heroku-buildpack-gsl-ruby,Altoros/ruby-buildpack,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,ekaranto/rails4-bluemix-buildpack,leonardykris/mos-ruby-buildpack,cloudn/buildpack-ruby,sanemat/heroku-buildpack-ruby-tachikoma,DigitalInnovation/heroku-buildpack-mslabs,moneyadviceservice/heroku-buildpack-ruby-bowndler,davidjrice/heroku-buildpack-couchbase-ruby,rowanoulton/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,ablease/custom-buildpack,crdschurch/heroku-buildpack-ruby,schu/buildpack-testing,fcruxen/ruby-buildpack,schu/buildpack-testing,gbenedict/heroku-buildpack-ruby,sky-uk/ruby-buildpack,d-reinhold/cf-buildpack-ruby,sgnpa/heroku-buildpack-cas,pilotcreative/heroku-buildpack-ruby,cmaggard/heroku-buildpack-turbo-sprockets,hatofmonkeys/ruby-testing-buildpack,gls1/heroku-buildpack-ruby-pdftk-new,Git-Host/prelang-buildpack,sky-uk/help-heroku-buildpack,DouglasAllen/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,teodor-pripoae/heroku-buildpack-ruby,shuber/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,zunda/heroku-buildpack-ruby,cloudn/buildpack-ruby,jeremyvdw/heroku-buildpack-ruby-jekyll,sanemat/heroku-buildpack-ruby-tachikoma,CPPWind/ruby-buildpack,zidekmat/buildpack-ruby,sgnpa/heroku-buildpack-cas,schu/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,gbenedict/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,sky-uk/ruby-buildpack,catalyzeio/buildpack-ruby,pietrop/heroku-buildpack-ruby,mperejda/heroku-buildpack-ruby,awebneck/heroku-buildpack-canvas,tenjikinc/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,cloudControl/buildpack-ruby,adaptivelab/heroku-buildpack-adaptivelab-website-2,simonnordberg/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,0x00evil/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,ablease/custom-buildpack,hpcloud/ruby-buildpack,hixi/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,hpcloud/ruby-buildpack,jonasoberschweiber/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,leonardykris/mos-ruby-buildpack,fcruxen/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,vhx/heroku-buildpack,brightbytes/heroku-buildpack-ruby-without-assets-precompile,phusion/heroku-buildpack-ruby,guidance-guarantee-programme/heroku-buildpack-princexml-old,makifund/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,jasonlevens/heroku-buildpack-ruby,jumptvs/BP_Ruby,ibmdb/db2rubybuildpack,moneyadviceservice/heroku-buildpack-ruby-bowndler,takii/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,dleavitt/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,bskyb-commerce/ruby-buildpack,barakav/heroku-buildpack-ruby,hellojustin/heroku-buildpack-custom-ruby,heroku/heroku-buildpack-ruby,phusion/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,space150/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,ericroberts/heroku-buildpack-ruby,reesio/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,Jonty/ruby-buildpack,rvizza/heroku-buildpack-gsl-ruby,bellycard/heroku-buildpack-ruby,redhotvengeance/heroku-buildpack-deep-thought,guidance-guarantee-programme/heroku-buildpack-princexml-old,AdStage/heroku-buildpack-ruby,darron/heroku-buildpack-ruby-jekyll,tpope/heroku-buildpack-ruby-tpope,zoomer/heroku-buildpack-ruby-bower,takii/db2rubybuildpack,hixi/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,orenyk/heroku-buildpack-ruby,erintherad/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk-new,fcruxen/ruby-buildpack,anay/buildpack-ruby-with-oracle-jdk,pkgr/heroku-buildpack-ruby,ablease/custom-buildpack,samfrench/heroku-buildpack-ruby,sstelfox/buildpack-ruby,iamjarvo/ruby-buildpack,crdschurch/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,sky-uk/help-heroku-buildpack,makifund/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,WilliamDenniss/heroku-buildpack-ruby-imagemagick,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,ndbroadbent/heroku-buildpack-turbo-sprockets,tenjikinc/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,simonnordberg/heroku-buildpack-ruby,jgarber/heroku-buildpack-ruby-octopress,derrek/heroku-buildpack-ruby,bellycard/heroku-buildpack-ruby,cloudControl/buildpack-ruby,recursecenter/heroku-buildpack-ruby,hellojustin/heroku-buildpack-custom-ruby,dtao/deft-buildpack-ruby,cloudfoundry/ruby-buildpack,DyegoCosta/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,ActiveState/heroku-buildpack-ruby,CPPWind/ruby-buildpack,Jonty/ruby-buildpack,space150/heroku-buildpack-ruby,fcruxen/ruby-buildpack,codykrieger/heroku-buildpack-jekyll,jumptvs/BP_Ruby,DouglasAllen/heroku-buildpack-ruby,ericroberts/heroku-buildpack-ruby,dtao/deft-buildpack-ruby,instacart/heroku-buildpack-ruby,hpcloud/ruby-buildpack,takii/db2rubybuildpack,allomov/fat-free-heroku-buildpack-ruby,righi/instacart-heroku-buildpack,KoanHealth/heroku-buildpack-marvin-setup,hpcloud/ruby-buildpack,DyegoCosta/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,orlando/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,swipesense/heroku-buildpack-ruby,cmaggard/heroku-buildpack-turbo-sprockets,iamjarvo/ruby-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,anay/buildpack-ruby-with-oracle-jdk,daltonrenaldo/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,dieze/heroku-buildpack-ruby-hooks,lemurheavy/heroku-buildpack-ruby,rhomobile/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,pietrop/heroku-buildpack-ruby,Altoros/ruby-buildpack,jgarber/heroku-buildpack-ruby-octopress,rhomobile/heroku-buildpack-ruby,jayshreeanand/heroku-buildpack-ruby,CPPWind/ruby-buildpack,donnykurnia/heroku-buildpack-ruby,samfrench/heroku-buildpack-ruby,jumptvs/BP_Ruby