nicer message on default runtime selection
nicer message on default runtime selection

alzheic/heroku-buildpack-aop,rouheet/heroku-buildpack-php,wzrdtales/heroku-buildpack-php,emeth-/heroku-buildpack-php,djuuru/heroku-buildpack-php,bajke992/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,babarinde/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,tungbi/heroku-buildpack-nginx-php-phalcon,bletchley/heroku-buildpack-php,heroku/heroku-buildpack-php,heroku/heroku-buildpack-php,pauljfranklin/heroku-buildpack-apache,alzheic/heroku-buildpack-aop,duythien/heroku-buildpack-php,duythien/heroku-buildpack-php,Apelsin/heroku-buildpack-phabricator,flant/heroku-buildpack-php,InnoraG/heroku-buildpack-php,Futurelearn/heroku-buildpack-php,0ppy/sample-buildpack,commoncurriculum/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,bletchley/heroku-buildpack-php,brendanmcdaniel/heroku-buildpack-php,dou800/php-buildpack-legacy,penciu/heroku-php-buildpack,stof/heroku-buildpack-php-1,stof/heroku-buildpack-php-1,emeth-/heroku-buildpack-php,josecelano/heroku-buildpack-php,rs-makino/buildpack-test,jjmontgo/phalcon-buildpack,josecelano/heroku-buildpack-php,brendanmcdaniel/heroku-buildpack-php,puteulanus/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,bajke992/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,AV4TAr/heroku-buildpack-php,rikur/heroku-buildpack-php,emeth-/heroku-buildpack-php,djuuru/heroku-buildpack-php,rikur/heroku-buildpack-php,Xev/heroku-app-buildpack-php,tideways/heroku-buildpack-php,pauljfranklin/heroku-buildpack-apache,a2service/heroku-buildpack-php,dzuelke/heroku-buildpack-php,dzuelke/heroku-buildpack-php,jopereyral/heroku-buildpack-php,jopereyral/heroku-buildpack-php,tungbi/heroku-buildpack-php,puteulanus/heroku-buildpack-php,Apelsin/heroku-buildpack-phabricator,flant/heroku-buildpack-php,marcofognog/cedar-14-php-buildpack,ActivKonnect/heroku-buildpack-php,rikur/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,cloudfoundry/php-buildpack-legacy,jjmontgo/phalcon-buildpack,elpereon/heroku-buildpack-php,CloudSide/heroku-buildpack-php,dou800/php-buildpack-legacy,DNESS/heroku-buildpack-php,penciu/heroku-php-buildpack,rs-makino/buildpack-test,mrapogee/heroku-buildpack-php,martijngastkemper/heroku-buildpack-php,ActivKonnect/heroku-buildpack-php,toshipon/heroku-buildpack-php,babarinde/heroku-buildpack-php,AV4TAr/heroku-buildpack-php,CloudSide/heroku-buildpack-php,rs-makino/buildpack-test,dou800/php-buildpack-legacy,dou800/php-buildpack-legacy,jstacoder/heroku-buildpack-php,a2service/heroku-buildpack-php,tungnguyenson/heroku-buildpack-nginx-php-phalcon,martijngastkemper/heroku-buildpack-php,wordpressmonk/herokuphp,wzrdtales/heroku-buildpack-php,a2service/heroku-buildpack-php,toshipon/heroku-buildpack-php,heroku/heroku-buildpack-php,InnoraG/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,iskandar/heroku-buildpack-php,bartuspan/heroku-buildpack-php,fgbreel/heroku-buildpack-php,dou800/php-buildpack-legacy,rs-makino/buildpack-test,jayelkaake/heroku-buildpack-magento,Futurelearn/heroku-buildpack-php,bartuspan/heroku-buildpack-php,dou800/php-buildpack-legacy,fizz/heroku-buildpack-php,wesrc/heroku-buildpack-php-1,createmultimedia/heroku-buildpack-php,wesrc/heroku-buildpack-php-1,mrapogee/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,DNESS/heroku-buildpack-php,jstacoder/heroku-buildpack-php,jayelkaake/heroku-buildpack-magento,tungbi/heroku-buildpack-php,phansys/heroku-buildpack-php,dzuelke/heroku-buildpack-php,fgbreel/heroku-buildpack-php,wordpressmonk/herokuphp,commoncurriculum/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,marcofognog/cedar-14-php-buildpack,rikur/heroku-buildpack-php,0ppy/sample-buildpack,cloudfoundry/php-buildpack-legacy,aakilfernandes/heroku-buildpack-php,phansys/heroku-buildpack-php,tucksaun/heroku-buildpack-php,rs-makino/buildpack-test,rs-makino/buildpack-test,Xev/heroku-app-buildpack-php,elpereon/heroku-buildpack-php,iskandar/heroku-buildpack-php,thecsea/heroku-buildpack-php-with-ioncube,dou800/php-buildpack-legacy,alzheic/heroku-buildpack-aop,philippwiendl/heroku-buildpack-php,dou800/php-buildpack-legacy,flant/heroku-buildpack-php,fizz/heroku-buildpack-php,philippwiendl/heroku-buildpack-php,tucksaun/heroku-buildpack-php,rouheet/heroku-buildpack-php,cloudfoundry/php-buildpack-legacy,emeth-/heroku-buildpack-php,aakilfernandes/heroku-buildpack-php,createmultimedia/heroku-buildpack-php,0ppy/sample-buildpack,jopereyral/heroku-buildpack-php,tungbi/heroku-buildpack-nginx-php-phalcon,dou800/php-buildpack-legacy,puteulanus/heroku-buildpack-php,tungnguyenson/heroku-buildpack-nginx-php-phalcon,heroku/heroku-buildpack-php,tideways/heroku-buildpack-php