update changelog
update changelog

orenyk/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,vhx/heroku-buildpack,cloudfoundry/ruby-buildpack,ericboehs/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,beydogan/ruby-buildpack,vhx/heroku-buildpack,moneyadviceservice/heroku-buildpack-ruby-bowndler,ekaranto/rails4-bluemix-buildpack,cordata/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,tenjikinc/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,donnykurnia/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,donnykurnia/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,bwaite-jaroop/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,pilotcreative/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,makifund/heroku-buildpack-ruby,Scalingo/ruby-buildpack,zoomer/heroku-buildpack-ruby-bower,andycroll/heroku-buildpack-jekyll,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack,moneyadviceservice/heroku-buildpack-ruby-bowndler,jumptvs/BP_Ruby,heroku/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,cordata/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,bwaite-jaroop/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,jumptvs/BP_Ruby,Genius/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,jumptvs/BP_Ruby,pkgr/heroku-buildpack-ruby,Scalingo/ruby-buildpack,zoomer/heroku-buildpack-ruby-bower,Genius/heroku-buildpack-ruby,jumptvs/BP_Ruby,jonseaberg/heroku-buildpack-turbo-sprockets,brightbytes/heroku-buildpack-ruby-without-assets-precompile,mattmanning/heroku-buildpack-ruby-jekyll,cloudfoundry/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,pilotcreative/heroku-buildpack-ruby,tenjikinc/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,ekaranto/rails4-bluemix-buildpack,beydogan/ruby-buildpack,ruby/heroku-buildpack-www-ruby-lang