#2. Add some comments explaining reasoning.
#2. Add some comments explaining reasoning.

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