allow usage of multiple nodejs versions
allow usage of multiple nodejs versions

circuithub/rogerwilco-buildpack,heroku/heroku-buildpack-pgbouncer,comlanio/nodejs-buildpack,therewasaguy/heroku-buildpack-nodejs-grunt-compass,pivotal-topher-bullock/lamby-js-buildpack,bionikspoon/annotation-tool-heroku-buildpack-nodejs,jasonswett/fv-heroku-buildpack-nodejs-gulp-bower,pkumar-appd/nodejs-buildpack,atmos/heroku-buildpack-nodejs,ArthurHlt/nodejs-buildpack,JProgrammer/heroku-buildpack-nodejs,brunoleite/heroku-buildpack-nodejs-jspm,AnyPresence/heroku-buildpack-nodejs,aarongray/heroku-buildpack-nodejs-gulp-bower,guilleva/heroku-buildpack-nodejs,thoughtbot/heroku-buildpack-nodejs,circuithub/rogerwilco-buildpack,simonjjones/snowedjs_buildpack,ericf89/heroku-buildpack-nodejs-gulp-haml-sass-compass,mushdigital20/heroku-buildpack-coffeescript,agriffis/heroku-buildpack-pgbouncer,heroku/heroku-buildpack-nodejs,Scalingo/nodejs-buildpack,ks2software/nodejs-buildpack,tobobo/heroku-buildpack-ember,sailrish/heroku-buildpack-coffee,kauffecup/nodejs-buildpack,atmos/heroku-buildpack-nodejs,arunoda/heroku-qrencode-buildpack,Scalingo/nodejs-buildpack,jrhite/heroku-buildpack-kwotefu,intuinno/bluemix-buildpack-meteor,tobobo/heroku-buildpack-ember,CloudSide/heroku-buildpack-nodejs,KamranAsif/heroku-buildpack-nodejs-bower-grunt,GoeGaming/heroku-buildpack-nodejs,themgt/buildpack-nodejs-grunt-bourbon,timdp/heroku-buildpack-nodejs-gulp,sailrish/heroku-buildpack-nodejs,ShakrMedia/heroku-buildpack-nodejs,aheissenberger/cloudcontrol-buildpack-meteor,pkumar-appd/nodejs-buildpack,realtymaps/heroku-buildpack-assets,kyleturco/heroku-buildpack-nodejs-gulp,Scratch-it/heroku-buildpack-nodejs-grunt-compass,timshadel/heroku-buildpack-stunnel,JaapRood/heroku-buildpack-yeoman,Grahahax/nodejs-buildpack,cnbin/heroku-buildpack-nodejs-grunt,WeConnect/heroku-buildpack-nodejs-grunt-compass,gfguthrie/heroku-buildpack-bower-grunt,roder/nodejs-buildpack,Scalingo/nodejs-buildpack,evac/habbit-buildpack,appstack/heroku-buildpack-nodejs-gulp,kfiroo/heroku-buildpack-nodejs-grunt-compass,Yobota/heroku-buildpack-pgbouncer,oocl-ncc-itm/nodejs-buildpack,aihaddad/heroku-buildpack-nodejs-gulp,kauffecup/nodejs-buildpack,nknj/heroku-buildpack-yo-angular,ajspera/heroku-buildpack-nodejs-grunt-compass,karthikeyabhaghavatula/nodejs_buildpack,kevinSuttle/heroku-buildpack-nodejs,mhussainm/bluemix-buildpack-meteor,olragon/heroku-buildpack-node-plus,shinji62/nodejs-buildpack,aquicore/heroku-buildpack-nodejs-gulp,bagelswitch/buildpack-nodejs,soswow/heroku-buildpack-nodejs-grunt-compass,ActiveState/cloudfoundry-buildpack-meteorite,diegobent/heroku-buildpack-nodejs,TheHealthPros/heroku-buildpack-nodejs,mick/heroku-buildpack-nodejs-zip,NSWIDER/nodejs-oracle-buildpack,artch/heroku-buildpack-nodejs-bower-gulp-grunt-compass,Crotery/heroku-buildpack-nodejs-grunt-compass,circuithub/heroku-buildpack-nodejs-new,gtothesquare/heroku-buildpack-nodejs-grunt,meenie/heroku-buildpack-nodejs-grunt-bower,dhcole/nodejs-buildpack,CandisIO/heroku-buildpack-node,hpcloud/cloudfoundry-buildpack-meteorite,olragon/heroku-buildpack-node-plus,pogoapp/buildpack-nodejs-kiwi,mrc535s/wkhtmltopdfbp,denisvlr/heroku-buildpack-nodejs-grunt-compass,rmoorman/heroku-buildpack-pgbouncer,JasonZigelbaum/heroku-buildpack-nodejs,shinji62/nodejs-buildpack,elasticio/heroku-buildpack-nodejs-grunt-old,davidmfoley/heroku-buildpack-nodejs-gulp-bower,jonmc12/heroku-buildpack-nodejs,gmaclennan/dokku-superstatic,ind1go/bluemix-buildpack-meteor,mpirik/heroku-buildpack-nodejs-grunt-compass,djng/heroku-buildpack-webapp-client,caiorogerio/heroku-buildpack-grunt,Stylitics/heroku-buildpack-nodejs,jasonswett/heroku-buildpack-nodejs-gulp,partus/buildpack-meteorite,greenapes/heroku-buildpack-nodejs-bower-gulp-grunt-compass,gregburek/heroku-buildpack-postgresql,aergonaut/heroku-buildpack-coffeescript,bpartridge83/heroku-buildpack-nodejs-grunt-gulp-bower,rtomlinson/cf-node-buildpack,dshafer/heroku-buildpack-nodejs,TJM/heroku-buildpack-nodejs,circuithub/heroku-buildpack-nodejs-grunt,Stibbons/heroku-buildpack-nodejs,mrc535s/wkhtmltopdfbp,shaneseaton/heroku-buildpack-meteorite,JaapRood/heroku-buildpack-yeoman,stephanmelzer/heroku-buildpack-nodejs-grunt-compass,hpcloud/nodejs-buildpack,ks2software/nodejs-buildpack,cloudfoundry/nodejs-buildpack,ArthurHlt/nodejs-buildpack,greenapes/heroku-buildpack-nodejs-bower-gulp-grunt-compass,ks2software/nodejs-buildpack,tlvince/heroku-buildpack-nodejs,shoetomydixi/node_sigma_zapp_buildpack,hpcloud/nodejs-buildpack,raghuveerthummeti/nodejs-buildpack,kauffecup/nodejs-buildpack,msuonp/heroku-buildpack-nodejs,neoskop/heroku-buildpack-nodejs-grunt-compass,robgraeber/heroku-buildpack-nodejs-gulp,201-created/heroku-buildpack-nodejs,hpcloud/cloudfoundry-buildpack-meteorite,gmaclennan/dokku-superstatic,ollisal/heroku-buildpack-nodejs,BetterWorks/heroku-buildpack-pgbouncer,crawsible/nodejs-buildpack,triceam/nodejs-buildpack,caiorogerio/heroku-buildpack-grunt,twilson63/custom-buildpack-nodejs-cups,hpcloud/nodejs-buildpack,carouselapps/heroku-buildpack-nodejs,mbuchetics/heroku-buildpack-nodejs-grunt,JProgrammer/heroku-buildpack-nodejs,The18thWarrior/ethereum-buildpack,JProgrammer/heroku-buildpack-nodejs,karthikeyabhaghavatula/nodejs_buildpack,shinji62/nodejs-buildpack,bagelswitch/buildpack-nodejs,oocl-ncc-itm/nodejs-buildpack,mmgm/nodejs-buildpack,raghuveerthummeti/nodejs-buildpack,Jonatasmz/heroku-buildpack-nodejs,ankparik/nodejs-buildpack,circuithub/heroku-buildpack-nodejs-grunt,MarkusMattinen/heroku-buildpack-nodejs,crawsible/nodejs-buildpack,jthomas/nodejs-v4-buildpack,cloudControl/buildpack-nodejs,tinganho/heroku-buildpack,meenie/heroku-buildpack-nodejs-grunt-bower,effinggames/heroku-buildpack-nodejs-bower-gulp,digitalfibr/heroku-buildpack-nodejs,StitchedCode/heroku-buildpack-nodejs-bower-gulp,pogoapp/buildpack-nodejs-kiwi,kirs/heroku-buildpack-nodejs,Dsyko/heroku-buildpack-meteorite,yookoala/heroku-buildpack-nodejs,mergermarket/heroku-buildpack-nodejs,marnold6/nodejs_buildpack,caiorogerio/heroku-buildpack-grunt,pkumar-appd/nodejs-buildpack,ArthurHlt/nodejs-buildpack,bellhops/heroku-buildpack-nodejs,andrewbranch/heroku-buildpack-nodejs-ember,glebm/heroku-buildpack-nodejs-grunt-sass,NSWIDER/nodejs-oracle-buildpack,apiaryio/heroku-buildpack-nodejs-grunt,twilson63/custom-buildpack-nodejs-cloud-foundry,ActiveState/cloudfoundry-buildpack-meteorite,cesarandreu/heroku-buildpack-nodejs,devakone/heroku-buildpack-nodejs-grunt-compass,robgraeber/heroku-buildpack-nodejs,tomfa/heroku-buildpack-nodejs,bionikspoon/heroku-buildpack-nodejs,newyorkdata/heroku-buildpack-nodejs-gulp,glebm/heroku-buildpack-nodejs-grunt-sass,Grahahax/nodejs-buildpack,kevinSuttle/heroku-buildpack-nodejs,pogoapp/buildpack-meteorite,mrmowgli/heroku-buildpack-meteorite,tfynes-pivotal/nodejs-buildpack,dam4222/heroku-buildpack-nodejs-gulp,themgt/buildpack-nodejs-grunt-bourbon,uonline/heroku-buildpack,elasticio/elasticio-buildpack-nodejs-original,edgahan/heroku-buildpack-nodejs,crdschurch/heroku-buildpack-gulp,rmisio/heroku-buildpack-nodejs-grunt-compass-bower,tlvince/heroku-buildpack-nodejs,simonjjones/snowedjs_buildpack,simonjjones/snowedjs_buildpack,actuosus/heroku-buildpack-adname,heroku/heroku-buildpack-nodejs,fbaraujo/heroku-buildpack-yo-angular,JaapRood/heroku-buildpack-yeoman,alexlafroscia/giteasy-buildpack,celerityweb/heroku-buildpack-nodejs-gulp,ShreyasWao/heroku-buildpack-nodejs,AdmanStrong/heroku-buildpack-nodejs-grunt-compass,tfynes-pivotal/nodejs-buildpack,chrisfelix82/heruku-buildpack-ffmpeg-nodejs,meenie/heroku-buildpack-nodejs-grunt-bower,tastemade/heroku-buildpack-nodejs-grunt-compass,pogoapp/buildpack-meteorite,pivotal-topher-bullock/lamby-js-buildpack,sky-uk/heroku-buildpack-nodejs-grunt-compass,TechRelease/cf-buildpack-nodejs,salesforceidentity/heroku-buildpack-nodejs-jdk8,stephanmelzer/heroku-buildpack-nodejs-grunt-compass,Scalingo/nodejs-buildpack,ks2software/nodejs-buildpack,mikeyoon/heroku-buildpack-nodejs,crito/interconnect-buildpack,mmgm/nodejs-buildpack,ankparik/nodejs-buildpack,circuithub/heroku-buildpack-nodejs-new,justinwalsh/heroku-buildpack-nodejs,robgraeber/heroku-buildpack-nodejs-bower-gulp,jamescallmebrent/heroku-buildpack-nodejs,comlanio/nodejs-buildpack,rainum/heroku-buildpack-nodejs-grunt-compass,evac/habbit-buildpack,actuosus/heroku-buildpack-adname,TechRelease/cf-buildpack-nodejs,vjm/heroku-buildpack-nodejs-grunt-compass,marnold6/nodejs_buildpack,gabegorelick/fracas-buildpack,nikhil-bhandari/ng-cli-buildpack,raghuveerthummeti/nodejs-buildpack,Azema/DeployGitNodejs,Ferrari/heroku-buildpack-nodejs,Amandeepsinghghai/heroku-buildpack-nodejs,karthikeyabhaghavatula/nodejs_buildpack,shuber/heroku-buildpack-nodejs,crito/interconnect-buildpack,tastemade/heroku-buildpack-nodejs-gulp,dvdwasibi/heroku-buildpack-nodejs-grunt-sass,bpartridge83/heroku-buildpack-nodejs-grunt-gulp-bower,Jell-E/heroku-buildpack-nodejs-rust,cjsaylor/heroku-buildpack-gcb,soswow/heroku-buildpack-nodejs-grunt-compass,totapari/heroku-buildpack-nodejs,cassinius/heroku-buildpack-meteorite,cinghiale/heroku-buildpack-nodejs-grunt-compass,triceam/nodejs-buildpack,Vincit/heroku-buildpack-nodejs,heroku/heroku-buildpack-nodejs,objectpartners/heroku-buildpack-nodejs-grunt,shaneseaton/heroku-buildpack-meteorite,davegwilt/heroku-buildpack-stunnel,roder/nodejs-buildpack,davidmfoley/heroku-buildpack-nodejs-gulp-bower,jasonswett/heroku-buildpack-nodejs-grunt-compass,djng/heroku-buildpack-webapp-client,antecursor/heroku-buildpack-nodejs-gulp,oortcloud/heroku-buildpack-meteorite,musicglue/heroku-buildpack-postgresql,chloeandisabel/heroku-buildpack-nodejs-gulp,cloudfoundry-community/cloudfoundry-buildpack-meteorite,tfynes-pivotal/nodejs-buildpack,dickeyxxx/heroku-buildpack-nodejs,appstack/heroku-buildpack-nodejs-gulp,crito/interconnect-buildpack,pixel2/heroku-buildpack-meteorite,ankparik/nodejs-buildpack,bagelswitch/buildpack-nodejs,elais/heroku-buildpack-nodejs,tjmehta/heroku-buildpack-nodejs-grunt-compass,dhcole/nodejs-buildpack,yaditya/heroku-buildpack-nodejs-gulp-haml-sass-compass,elasticio/heroku-buildpack-nodejs-grunt,glawson6/heroku-buildpack-nodejs,nemesiscodex/heroku-buildpack-nodejs,tamdao/heroku-buildpack-nodejs,cassinius/heroku-buildpack-meteorite,gvelo/heroku-buildpack-nodejs-grunt,cloudfoundry/nodejs-buildpack,stevenrigby/heroku-buildpack-nodejs,crawsible/nodejs-buildpack,Scalingo/nodejs-buildpack,themgt/buildpack-nodejs-grunt-bourbon,Azema/DeployGitNodejs,Grahahax/nodejs-buildpack,willow-codes/heroku-buildpack-nodejs-bower-gulp-grunt-compass,olragon/heroku-buildpack-nodejs-sqlmap,ollisal/heroku-buildpack-nodejs,fcruxen/heroku-buildpack-nodejs,tweettypography/heroku-buildpack-nodejs,cheeyeo/heroku-buildpack-nodejs,mick/heroku-buildpack-nodejs-zip,ahamidi/heroku-buildpack-node-couchbase,nikhil-bhandari/heroku-buildpack-nodejs-grunt-compass,cloudfoundry/nodejs-buildpack,tlvince/heroku-buildpack-nodejs,The18thWarrior/ethereum-buildpack,linemanjs/heroku-buildpack-lineman,NSWIDER/nodejs-oracle-buildpack,rtomlinson/cf-node-buildpack,comlanio/nodejs-buildpack,ctrlaltdel121/heroku-buildpack-nodejs,ks2software/nodejs-buildpack,stevenrigby/heroku-buildpack-nodejs,fedosov/heroku-buildpack-nodejs-gulp-bower,Hylozoic/heroku-buildpack-nodejs-babel,ahamidi/heroku-buildpack-node-couchbase,imothee/heroku-buildpack-nodejs-grunt,jrhite/heroku-buildpack-skippydoo,ks2software/nodejs-buildpack,tnguyen14/heroku-buildpack-meteorite,lemondemon/heroku-buildpack-nodejs-grunt-compass,vladikoff/heroku-buildpack-fxa,jonmc12/heroku-buildpack-nodejs,adrianhuna/heroku-buildpack-nodejs-gulp-bower,krry/heroku-buildpack-nodejs-gulp-bower,subhog/heroku-buildpack-meteorite-phantomjs,jamescallmebrent/heroku-buildpack-nodejs,tnguyen14/heroku-buildpack-meteorite,teodor-pripoae/heroku-buildpack-nodejs-gulp,jasonswett/heroku-buildpack-nodejs-gulp-bower,rtomlinson/cf-node-buildpack,Gaelan/buildpack-meteor-0.9,actuosus/heroku-buildpack-adname,heroku/heroku-buildpack-nodejs,201-created/heroku-buildpack-nodejs,cassinius/heroku-buildpack-meteorite,goodeggs/heroku-buildpack-nodejs,oneibmcloud/bluemix-buildpack-meteor,dhcole/nodejs-buildpack,leourbina/heroku-buildpack-nodejs-gulp-sass,Shyp/heroku-buildpack-pgbouncer,kudos/heroku-buildpack-nodejs-jspm,arunoda/heroku-qrencode-buildpack,findtopher/heroku-buildpack-meteorite,ahamidi/heroku-buildpack-node-couchbase,mrc535s/wkhtmltopdfbp,pivotal-topher-bullock/lamby-js-buildpack,crdschurch/heroku-buildpack-gulp,realtymaps/heroku-buildpack-pgbouncer,evac/habbit-buildpack,triceam/nodejs-buildpack,sibeliusseraphini/heroku-buildpack-nodejs-bower-grunt,circuithub/heroku-buildpack-nodejs-grunt,jthomas/nodejs-v4-buildpack,REscour/heroku-buildpack-nodejs-gulp-bower-sass,jthomas/nodejs-v4-buildpack,davious/heroku-buildpack-nodejs-grunt-compass,ks2software/nodejs-buildpack,mmgm/nodejs-buildpack,marnold6/nodejs_buildpack,piglovesyou/heroku-buildpack-nodejs,danielgranat/heroku-buildpack-nodejs-grunt,shedd/heroku-buildpack-nodejs,cloudfoundry/nodejs-buildpack,olragon/heroku-buildpack-nodejs-sqlmap,cloudfoundry-community/cloudfoundry-buildpack-meteorite,djng/heroku-buildpack-webapp-client,oocl-ncc-itm/nodejs-buildpack,Ensequence/heroku-buildpack-yo-angular,findtopher/heroku-buildpack-meteorite,aergonaut/heroku-buildpack-coffeescript,subhog/heroku-buildpack-meteorite-phantomjs,olragon/heroku-buildpack-nodejs-sqlmap,atmos/heroku-buildpack-nodejs,roder/nodejs-buildpack,tastemade/heroku-buildpack-nodejs-grunt-compass,Vestride/heroku-buildpack-nodejs-bower-depth,AndyGriffiths/heroku-buildpack-meteorite,heroku/heroku-buildpack-nodejs,gabegorelick/fracas-buildpack,leourbina/heroku-buildpack-nodejs-gulp-sass