update ENV['RUBY_VERSION'] to match Bundler 1.2.0.pre dsl
update ENV['RUBY_VERSION'] to match Bundler 1.2.0.pre dsl

travis-ci/heroku-buildpack-ruby,sstelfox/buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,hausdorff/heroku-buildpack-ruby-jekyll,sgnpa/heroku-buildpack-cas,darron/heroku-buildpack-ruby-jekyll,swipesense/heroku-buildpack-ruby,swipesense/heroku-buildpack-ruby,rstacruz/heroku-buildpack-middleman,makifund/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,phusion/heroku-buildpack-ruby,DouglasAllen/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,tomwolfe/heroku-buildpack-gsl-ruby,ibmdb/db2rubybuildpack,gbenedict/heroku-buildpack-ruby,DouglasAllen/heroku-buildpack-ruby,cmaggard/heroku-buildpack-turbo-sprockets,musicglue/heroku-buildpack-ruby,ericroberts/heroku-buildpack-ruby,pcincalifornia/wdc-heroku-buildpack-middleman,redhotvengeance/heroku-buildpack-deep-thought,darron/heroku-buildpack-ruby-jekyll,zoomer/heroku-buildpack-ruby-bower,reesio/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,Jonty/ruby-buildpack,cmaggard/heroku-buildpack-turbo-sprockets,takii/heroku-buildpack-ruby,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,WilliamDenniss/heroku-buildpack-ruby-imagemagick,KoanHealth/heroku-buildpack-marvin-setup,ActiveState/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,hausdorff/heroku-buildpack-ruby-jekyll,gls1/heroku-buildpack-ruby-pdftk-new,sky-uk/help-heroku-buildpack,engineyard/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,instacart/heroku-buildpack-ruby,hone/heroku-buildpack-ruby,ndbroadbent/heroku-buildpack-turbo-sprockets,takii/db2rubybuildpack,stolt45/heroku-buildpack-ruby-with-sqlite3,cordata/heroku-buildpack-ruby,AdStage/heroku-buildpack-ruby,firmhouse/heroku-buildpack-ruby-freetds,takii/db2rubybuildpack,bskyb-commerce/ruby-buildpack,bskyb-commerce/help-heroku-buildpack,DyegoCosta/heroku-buildpack-ruby,ablease/custom-buildpack,Genius/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,erintherad/heroku-buildpack-ruby,michaelphines/alexa-nest,dtao/deft-buildpack-ruby,barakav/heroku-buildpack-ruby,mperejda/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,progrium/heroku-buildpack-ruby,hone/heroku-buildpack-ruby,space150/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,schu/buildpack-testing,sstelfox/buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,WilliamDenniss/heroku-buildpack-ruby-imagemagick,hixi/heroku-buildpack-ruby,stefansundin/heroku-buildpack-ruby,hatofmonkeys/ruby-testing-buildpack,HYPERHYPER/heroku-buildpack-ruby,wolfoo2931/heroku-buildpack-ruby-2a352ae,mperejda/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,ejholmes/heroku-buildpack-middleman,rvizza/heroku-buildpack-gsl-ruby,sky-uk/ruby-buildpack,bwaite-jaroop/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,aarongray/heroku-buildpack-ruby,hpcloud/heroku-buildpack-ruby,fcruxen/ruby-buildpack,cloudfoundry/ruby-buildpack,0x00evil/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,HYPERHYPER/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,zidekmat/buildpack-ruby,takii/db2rubybuildpack,pilotcreative/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,ndbroadbent/heroku-buildpack-turbo-sprockets,hatofmonkeys/ruby-testing-buildpack,AdStage/heroku-buildpack-ruby,Git-Host/prelang-buildpack,meskyanichi/heroku-buildpack-middleman,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,awebneck/heroku-buildpack-canvas,fgbreel/heroku-buildpack-ruby,bellycard/heroku-buildpack-ruby,joshco/heroku-buildpack-ruby,Scalingo/ruby-buildpack,rhomobile/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,12spokes/heroku-buildpack-ruby-imagemagick,thirdprestige/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,sky-uk/help-heroku-buildpack,aarongray/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,cloudn/buildpack-ruby,zunda/heroku-buildpack-ruby,joshco/heroku-buildpack-ruby,Numerico/heroku-buildpack-ruby,packetmonkey/heroku-buildpack-ruby,sanemat/heroku-buildpack-ruby-tachikoma,tpope/heroku-buildpack-ruby-tpope,ejholmes/heroku-buildpack-middleman,redhotvengeance/heroku-buildpack-deep-thought,hellojustin/heroku-buildpack-custom-ruby,dtao/teeny-buildpack,mattwalters/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,atmos/heroku-buildpack-ruby,dlorson/gentle-buildpack,Jonty/ruby-buildpack,dlorson/gentle-buildpack,leonardykris/mos-ruby-buildpack,ablease/custom-buildpack,pkgr/buildpack-ruby-precise-old,nthj/heroku-buildpack-mirror,thewebguy/heroku-buildpack-ruby-ffmpeg-libsndfile,hatofmonkeys/ruby-testing-buildpack,schu/heroku-buildpack-ruby,travis-ci/heroku-buildpack-ruby,jumptvs/BP_Ruby,vhx/heroku-buildpack,teodor-pripoae/heroku-buildpack-ruby,crdschurch/heroku-buildpack-ruby,cloudn/buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,vhx/heroku-buildpack,allomov/fat-free-heroku-buildpack-ruby,hpcloud/heroku-buildpack-ruby,dieze/heroku-buildpack-ruby-hooks,dtao/deft-buildpack-ruby,jayshreeanand/heroku-buildpack-ruby,rstacruz/heroku-buildpack-middleman,d-reinhold/cf-buildpack-ruby,bskyb-commerce/ruby-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,hpcloud/ruby-buildpack,pilotcreative/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,zidekmat/buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,AdStage/heroku-buildpack-ruby,Numerico/heroku-buildpack-ruby,schu/buildpack-testing,jeremyvdw/heroku-buildpack-ruby-jekyll,jcamenisch/heroku-buildpack-rgeo,shuber/heroku-buildpack-ruby,schu/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,daltonrenaldo/heroku-buildpack-ruby,hpcloud/ruby-buildpack,scottatron/moc-buildpack,12spokes/heroku-buildpack-ruby-imagemagick,rowanoulton/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,jgarber/heroku-buildpack-ruby-octopress,Altoros/ruby-buildpack,diasks2/heroku-buildpack-mecab,zunda/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,progrium/heroku-buildpack-ruby,takii/db2rubybuildpack,tomwolfe/heroku-buildpack-gsl-ruby,Jonty/ruby-buildpack,bskyb-commerce/help-heroku-buildpack,tdenovan/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,Altoros/ruby-buildpack,guidance-guarantee-programme/heroku-buildpack-princexml-old,dieze/heroku-buildpack-ruby-hooks,ekaranto/rails4-bluemix-buildpack,brightbytes/heroku-buildpack-ruby-without-assets-precompile,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,progrium/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,Dim25/heroku-buildpack-ruby-GSL,jonseaberg/heroku-buildpack-turbo-sprockets,jgarber/heroku-buildpack-ruby-octopress,dleavitt/heroku-buildpack-ruby,CPPWind/ruby-buildpack,sky-uk/ruby-buildpack,Genius/heroku-buildpack-ruby,space150/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,thirdprestige/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,iamjarvo/ruby-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,adaptivelab/heroku-buildpack-adaptivelab-website-2,DyegoCosta/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,jeremyvdw/heroku-buildpack-ruby-jekyll,hixi/heroku-buildpack-ruby,Altoros/ruby-buildpack,ltrademark/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,takii/heroku-buildpack-ruby,fgbreel/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,firmhouse/heroku-buildpack-ruby-freetds,cloudfoundry/ruby-buildpack,centresource/heroku-buildpack-turbo-sprockets-pmp-ffm,codykrieger/heroku-buildpack-jekyll,brightbytes/heroku-buildpack-ruby-without-assets-precompile,sanemat/heroku-buildpack-ruby-tachikoma,orenyk/heroku-buildpack-ruby,adaptivelab/heroku-buildpack-adaptivelab-website-2,pavgup/heroku-buildpack-ruby-lateslugignore,sanemat/heroku-buildpack-ruby-tachikoma,pkgr/heroku-buildpack-ruby,daltonrenaldo/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,sky-uk/ruby-buildpack,nicholasmott/heroku-buildpack-octopress,stefansundin/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,hellojustin/heroku-buildpack-custom-ruby,jcamenisch/heroku-buildpack-rgeo,ruby/heroku-buildpack-www-ruby-lang,sgnpa/heroku-buildpack-cas,cloudfoundry/ruby-buildpack,atmos/heroku-buildpack-ruby,anay/buildpack-ruby-with-oracle-jdk,ericboehs/heroku-buildpack-ruby,cloudn/buildpack-ruby,beydogan/ruby-buildpack,fcruxen/ruby-buildpack,teodor-pripoae/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,wolfoo2931/heroku-buildpack-ruby-2a352ae,simonnordberg/heroku-buildpack-ruby,lemurheavy/heroku-buildpack-ruby,ActiveState/heroku-buildpack-ruby,travis-ci/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,nthj/heroku-buildpack-mirror,ablease/custom-buildpack,jumptvs/BP_Ruby,samfrench/heroku-buildpack-ruby,cordata/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,awebneck/heroku-buildpack-canvas,0x00evil/heroku-buildpack-ruby,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,jumptvs/BP_Ruby,cloudControl/buildpack-ruby,crdschurch/heroku-buildpack-ruby,meskyanichi/heroku-buildpack-middleman,sky-uk/ruby-buildpack,sgnpa/heroku-buildpack-cas,zoomer/heroku-buildpack-ruby-bower,pkgr/heroku-buildpack-ruby,michaelphines/alexa-nest,orlando/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,reesio/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,donnykurnia/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,dleavitt/heroku-buildpack-ruby,beydogan/ruby-buildpack,pietrop/heroku-buildpack-ruby,cloudControl/buildpack-ruby,simonnordberg/heroku-buildpack-ruby,pkgr/buildpack-ruby-precise-old,trumaker/heroku-buildpack-turbo-sprockets,heroku/heroku-buildpack-ruby,stolt45/heroku-buildpack-ruby-with-sqlite3,leonardykris/mos-ruby-buildpack,atmos/heroku-buildpack-ruby,Altoros/ruby-buildpack,lemurheavy/heroku-buildpack-ruby,mrhenry/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,Numerico/heroku-buildpack-ruby,pcincalifornia/wdc-heroku-buildpack-middleman,Dim25/heroku-buildpack-ruby-GSL,shuber/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,dtao/teeny-buildpack,qnyp/heroku-buildpack-ruby-bower,ascot21/heroku-buildpack-turbo-sprockets,phusion/heroku-buildpack-ruby,wakermahmud/heroku-buildpack-jekyll,CPPWind/ruby-buildpack,rhomobile/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,jglascoe/heroku-buildpack-ruby-jekyll,thirdprestige/heroku-buildpack-ruby,hpcloud/ruby-buildpack,jglascoe/heroku-buildpack-ruby-jekyll,orlando/heroku-buildpack-ruby,fcruxen/ruby-buildpack,jayshreeanand/heroku-buildpack-ruby,jumptvs/BP_Ruby,ilpoldo/heroku-buildpack-ruby,cloudn/buildpack-ruby,iamjarvo/ruby-buildpack,mintybit/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,mrhenry/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,nicholasmott/heroku-buildpack-octopress,andycroll/heroku-buildpack-jekyll,guidance-guarantee-programme/heroku-buildpack-princexml-old,pavgup/heroku-buildpack-ruby-lateslugignore,trumaker/heroku-buildpack-turbo-sprockets,samfrench/heroku-buildpack-ruby,righi/instacart-heroku-buildpack,hpcloud/ruby-buildpack,Git-Host/prelang-buildpack,gls1/heroku-buildpack-ruby-pdftk-new,ekaranto/rails4-bluemix-buildpack,pavgup/heroku-buildpack-ruby-lateslugignore,CPPWind/ruby-buildpack,blueapron/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,gbenedict/heroku-buildpack-ruby,fcruxen/ruby-buildpack,gls1/heroku-buildpack-ruby-pdftk,jgable/buildpack-ruby-rack-setup-tasks,millie/heroku-buildpack-ruby-with-pdftk,diasks2/heroku-buildpack-mecab,jgable/buildpack-ruby-rack-setup-tasks,ilpoldo/heroku-buildpack-ruby,davidjrice/heroku-buildpack-couchbase-ruby,Jonty/ruby-buildpack,nicholasmott/heroku-buildpack-octopress,ablease/custom-buildpack,donnykurnia/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,ChefSteps/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,Scalingo/ruby-buildpack,erintherad/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,firmhouse/heroku-buildpack-ruby-freetds,qnyp/heroku-buildpack-ruby-bower,bellycard/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,wakermahmud/heroku-buildpack-jekyll,phusion/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,WilliamDenniss/heroku-buildpack-ruby-imagemagick,jasonlevens/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,ericroberts/heroku-buildpack-ruby,codykrieger/heroku-buildpack-jekyll,barakav/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,millie/heroku-buildpack-ruby-with-pdftk,CPPWind/ruby-buildpack,scottatron/moc-buildpack,mattwalters/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,jgarber/heroku-buildpack-ruby-octopress,ibmdb/db2rubybuildpack,tpope/heroku-buildpack-ruby-tpope