Update README about Multipack apps
Update README about Multipack apps

marcospy/heroku-buildpack-scipy,marcospy/hackathon-globo-app,projetoeureka/heroku-buildpack-scipy,cortexintel/heroku-buildpack-scipy,nicktimko/heroku-buildpack-scipy,xica/heroku-buildpack-scipy,brianthomas/heroku-buildpack-textmining,vlidholt/heroku-buildpack-scipy,marcospy/hackathon-globo-app,pwdel1/heroku-buildpack-scipy,river-jade/heroku-buildpack-scipy,thenovices/heroku-buildpack-scipy,marcospy/hackathon-globo-app,predata/heroku-buildpack-scipy