detecting if mercurial is used, if so install before requirements
detecting if mercurial is used, if so install before requirements

ywarezk/heroku-buildpack-geodjango,rawWhipIT/p22-goldant-buildpack,liyanchang/cloudfoundary-buildbot-buildpack,samuelhavron/heroku-buildpack-python,codeforamerica/heroku-buildpack-pygeo,buildingenergy/heroku-buildpack-python-leatherman,maciejgryka/heroku-buildpack-spcedge,swils/heroku-buildpack-python,ianyh/heroku-buildpack-python-nodejs,predata/heroku-buildpack-scipy,mdz/heroku-buildpack-python,uniphil/heroku-buildpack-pythonsass,pkumar-appd/python-buildpack,jimlindeman/python-buildpack-collectd,incuna/heroku-buildpack-python-test,benslavin/heroku-buildpack-python,ianyh/heroku-buildpack-python-opencv,lyft/heroku-buildpack-python-data,orablu/heroku-buildpack,stalnacke/heroku-buildpack-python,mjumbewu/heroku-buildpack-python-no-node,benslavin/heroku-buildpack-python,Nazanin84/python-buildpack,marcospy/heroku-buildpack-scipy,ianyh/heroku-buildpack-python-nodejs,craigkerstiens/gistlog,econchick/heroku-buildpack-python,blazekadam/open2,pkumar-appd/python-buildpack,psrthegreat/heroku-buildpack-python-sklearn,xica/heroku-buildpack-scipy,lucasvo/heroku-buildpack-python-with-node,mfenniak/heroku-buildpack-python-libffi,SciDevs/heroku-buildpack-python-scikit-learn-git,ad-m/heroku-buildpack-python,SciDevs/heroku-buildpack-python-scikit-learn-git,wbrefvem/heroku-buildpack-python,snapist/heroku-buildpack-python-opencv,edmorley/heroku-buildpack-python,kikin81/heroku-buildpack,drinks/heroku-buildpack-python-base,alexflanagan/operand-buildpack-python,osharim/-heroku-buildpack-python,davidcbucher/heroku-buildpack-geo-python,cirlabs/heroku-buildpack-geodjango,galuszkak/heroku-buildpack-django,jvenezia/heroku-buildpack-python,legnaleurc/heroku-buildpack-python,mjumbewu/heroku-buildpack-python-no-node,Scalingo/python-buildpack,projetoeureka/heroku-buildpack-scipy,liyanchang/cloudfoundary-buildbot-buildpack,Mause/heroku-buildpack-python,dbrgn/heroku-buildpack-python-sklearn,PerceptumNL/heroku-buildpack-python,ianyh/heroku-buildpack-python-extras,doda/heroku-buildpack-python,hsr-ba-fs15-dat/heroku-buildpack,integricho/heroku-buildpack-python-ffmpeg-lame,HousekeepLtd/heroku-buildpack-python,alexflanagan/operand-buildpack-python,nwkotto/geodjango-buildpack-with-geos,integricho/heroku-buildpack-python-ffmpeg-lame,Gliimpse/heroku-buildpack-SWIG-python,evnpr/herokupython,benmurden/heroku-buildpack-python-ember,blazekadam/opencv,cdht/heroku-buildpack-python,YoApp/heroku-buildpack-python-twemproxy,pmclanahan/heroku-buildpack-python-peep,jimlindeman/python-buildpack-collectd,cloudfoundry/python-buildpack,kennethjiang/heroku-buildpack-python-libffi,jms6520/cf-python,dbrgn/heroku-npscipy,rajpurkar/heroku-buildpack-python-sklearn,benjaminfox/heroku-buildpack-python-geoip,cirlabs/heroku-buildpack-geodjango,guidowb/buildpack-python,lucasvo/heroku-buildpack-python-with-node,dbrgn/heroku-buildpack-python-sklearn,cortexintel/heroku-buildpack-scipy,codeforamerica/heroku-buildpack-pygeo,incuna/heroku-buildpack-python-test,davidcbucher/heroku-buildpack-geo-python,ephemerallabs/heroku-buildpack-python,mtigas/heroku-buildpack-pypy,apiaryio/heroku-buildpack-python-scons,localmed/heroku-buildpack-python-extras,sookasa/heroku-buildpack-python-pipeline,cclauss/heroku-buildpack-python,jms6520/cf-python,everysignalinc/heroku-buildpack-python-scikit-learn-git,joshisa/python-buildpack,craigkerstiens/gistlog,incuna/heroku-buildpack-python-test,dubsmash/heroku-buildpack-python,andela-brotich/wger-buildpack-python,dbrgn/heroku-npscipy,econchick/heroku-buildpack-python,ianyh/heroku-buildpack-python-opencv,RobertSundling/heroku-buildpack-python-nginx,jms6520/cf-python,mfenniak/heroku-buildpack-python-libffi,evnpr/herokupython,brianthomas/heroku-buildpack-textmining,lukaszkorecki/heroku-buildpack-python,kennethjiang/heroku-buildpack-python-libffi,craigkerstiens/gistlog,uniphil/heroku-buildpack-pythonsass,galuszkak/heroku-buildpack-django,tommyvn/heroku-buildpack-python,agriffis/heroku-buildpack-python,rawWhipIT/p22-goldant-buildpack,rollokb/heroku-buildpack-python,pwdel1/heroku-buildpack-scipy,integricho/heroku-buildpack-python-ffmpeg2.1-with-codecs,lucasvo/heroku-buildpack-python-with-node,localmed/heroku-buildpack-python-extras,martingascon/heroku-buildpack-python,ghhong1986/crfpp-python-buildpack-for-heroku,bolster/heroku-buildpack-bolster,bolster/heroku-buildpack-bolster,ad-m/heroku-buildpack-python,wyn/heroku-buildpack-python,osharim/-heroku-buildpack-python,apiaryio/heroku-buildpack-python-scons,nicktimko/heroku-buildpack-scipy,econchick/heroku-buildpack-python,sjtuadamyang/adamyang-buildpack-python-libjpeg,brightforme/heroku-buildpack-python,apiaryio/heroku-buildpack-python-scons,localmed/heroku-buildpack-python-extras,scrapinghub/scrapinghub-buildpack-scrapy,zakdoek/heroku-buildpack-django,kennethjiang/heroku-buildpack-python-libffi,kowito/python-buildpack,monological/heroku-buildpack-python-opencv,18F/python-buildpack,TipWander/heroku-buildpack-geodjango,jiaaro/heroku-buildpack-django,rajpurkar/heroku-buildpack-python-sklearn,Gliimpse/heroku-buildpack-SWIG-python,nemesiscodex/heroku-buildpack-python,adamroth/heroku-buildpack-python-pdftk,jamarparris/heroku-buildpack-python-swig,liyanchang/buildbot-master-buildpack,alexluke/heroku-buildpack-python-extras,lyft/heroku-buildpack-python-data,orablu/heroku-buildpack,film42/heroku-buildpack-python-wkhtmltopdf,soapril/heroku-buildpack-python,ekkleesia2/heroku-buildpack-python,dvreed/heroku-buildpack-python-ldap,mdz/heroku-buildpack-python,drinks/heroku-buildpack-python-scipy,andrespires/python-buildpack,cloudfoundry/python-buildpack,guidowb/buildpack-python,rbtying/heroku-buildpack-python,tukutela/heroku-buildpack-python,thenovices/heroku-buildpack-scipy,HanSooloo/heroku-buildpack-python,resmio/heroku-buildpack-geodjango,mdz/heroku-buildpack-python,psrthegreat/heroku-buildpack-python-sklearn,joshisa/python-buildpack,drinks/heroku-buildpack-python-base,samuelhavron/heroku-buildpack-python,arnfred/heroku-buildpack-python-hdf5-blas-lapack,marcospy/hackathon-globo-app,evnpr/herokupython,mythmon/heroku-buildpack-python-nodejs,DylanLukes/heroku-buildpack-python,mtigas/heroku-buildpack-pypy,mjumbewu/heroku-buildpack-python-no-node,gitricko/apt-python-buildpack,SciDevs/heroku-buildpack-python-scikit-learn-git,joshisa/python-buildpack,marcospy/hackathon-globo-app,econchick/heroku-buildpack-python,jimlindeman/python-buildpack-collectd,heroku/heroku-buildpack-python,legnaleurc/heroku-buildpack-python,julienbou/heroku-buildpack-serpan,zakdoek/heroku-buildpack-django,papaeye/heroku-buildpack-python-bower,rapilabs/heroku-buildpack-python,vlidholt/heroku-buildpack-scipy,oberlin/heroku-buildpack-python,AltSchool/heroku-buildpack-python,kvarga/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,18F/python-buildpack,minichate/heroku-buildpack-ldap,chalkchisel/heroku-buildpack-bolster,buildingenergy/heroku-buildpack-python-leatherman,ruscoder/heroku-buildpack-python,legnaleurc/heroku-buildpack-python,osharim/-heroku-buildpack-python,ryanhiebert/heroku-buildpack-python,alexluke/heroku-buildpack-python-extras,Gliimpse/heroku-buildpack-SWIG-python,guidowb/buildpack-python,igroff/heroku-buildpack-python,liyanchang/cloudfoundary-buildbot-buildpack,wbrefvem/heroku-buildpack-python,manufacturedba/heroku-buildpack-python,aldryn/heroku-buildpack-python,marianzange/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,minichate/heroku-buildpack-ldap,jms6520/cf-python,maxcountryman/heroku-buildpack-python,cirlabs/heroku-buildpack-geodjango,gaumire/heroku-buildpack-python,arnfred/heroku-buildpack-python-hdf5-blas-lapack,nikita-pivovarov/heroku-buildpack-python-ldap,gitricko/apt-python-buildpack,drinks/heroku-buildpack-python-scipy,aldryn/heroku-buildpack-python,orablu/heroku-buildpack,boardman/sphinx-buildpack,snapist/heroku-buildpack-python-opencv,wyn/heroku-buildpack-python,ruscoder/heroku-buildpack-python-with-node,galuszkak/heroku-buildpack-django,Brogency/heroku-buildpack-python-gulp,loanzen/heroku-buildpack-python,integricho/heroku-buildpack-python-ffmpeg-lame,benmurden/heroku-buildpack-python-ember,craigkerstiens/gistlog,mobify/heroku-buildpack-python-swig,dulaccc/heroku-buildpack-geodjango,samuelhavron/heroku-buildpack-python,WonderThink/heroku-buildpack-python-ffmpeg-geoip,smalleats/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,beni55/heroku-buildpack-python,wyn/heroku-buildpack-python,swanson/heroku-buildpack-python-ortools,uniphil/heroku-buildpack-pythonsass,dbrgn/heroku-buildpack-python-sklearn,kennethreitz/sphinx-buildpack,kikin81/heroku-buildpack,buildingenergy/heroku-buildpack-python-leatherman,drinks/heroku-buildpack-python-base,ianyh/heroku-buildpack-python-extras,benslavin/heroku-buildpack-python,icoxfog417/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,Scalingo/python-buildpack,kowito/python-buildpack,samuelhavron/heroku-buildpack-python,pebble/cloudpebble-buildpack,andrespires/python-buildpack,samuelhavron/heroku-buildpack-python,drinks/heroku-buildpack-python-scipy,aldryn/heroku-buildpack-python,orablu/heroku-buildpack,arnaudlimbourg/heroku-buildpack-python,rawWhipIT/p22-goldant-buildpack,ianyh/heroku-buildpack-python-extras,jbenet/heroku-buildpack-python,davidcbucher/heroku-buildpack-geo-python,rajpurkar/heroku-buildpack-python-sklearn,julienbou/heroku-buildpack-serpan,jbenet/heroku-buildpack-python,dbrgn/heroku-npscipy,Tiger66639/buildbot-master-buildpack,arnfred/heroku-buildpack-python-hdf5-blas-lapack,driftyco/heroku-buildpack-sphinx,cloudfoundry/python-buildpack,Stibbons/heroku-buildpack-python-installer,ojacobson/heroku-buildpack-python,bobsilverberg/heroku-buildpack-python-peep,everysignalinc/heroku-buildpack-python-scikit-learn-git,davidcbucher/heroku-buildpack-geo-python,edenspiekermann-amsterdam/heroku-buildpack-python,tukutela/heroku-buildpack-python,doda/heroku-buildpack-python,jbenet/heroku-buildpack-python,buildbot/buildbot-master-buildpack,river-jade/heroku-buildpack-scipy,sookasa/heroku-buildpack-python-pipeline,18F/python-buildpack,amanjain/heroku-buildpack-python-with-django-bower,ghhong1986/crfpp-python-buildpack-for-heroku,kikin81/heroku-buildpack,kikin81/heroku-buildpack,pkumar-appd/python-buildpack,joshfriend/heroku-buildpack-python,junyoed/heroku-buildpack-python,psrthegreat/heroku-buildpack-python-sklearn,drinks/heroku-buildpack-python-base,skilljar/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,evnpr/herokupython,jiaaro/heroku-buildpack-django,plangrid/heroku-buildpack-python,ianyh/heroku-buildpack-python-bower,jbenet/heroku-buildpack-python,markine/heroku-buildpack-python,ianyh/heroku-buildpack-python-nodejs,andrespires/python-buildpack,chalkchisel/heroku-buildpack-bolster,ruscoder/heroku-buildpack-python-with-node,miraculixx/heroku-buildpack-python,joshowen/heroku-buildpack-python,ianyh/heroku-buildpack-python-opencv,slorg1/heroku-buildpack-python,heroku/heroku-buildpack-python,mfenniak/heroku-buildpack-python-libffi,lyft/heroku-buildpack-python-data,Nazanin84/python-buildpack,AltSchool/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,drinks/heroku-buildpack-python-scipy,sookasa/heroku-buildpack-python-pipeline,gitricko/apt-python-buildpack,nadirizr/heroku-buildpack-python-gulp,Nazanin84/python-buildpack,cloudControl/buildpack-python,kowito/python-buildpack,blazekadam/opencv,everysignalinc/heroku-buildpack-python-scikit-learn-git,grivescorbett/heroku-buildpack-python,marcospy/hackathon-globo-app,Apogaea/heroku-buildpack-python