Update the README.md with more contributors and the deployment fix issue
Update the README.md with more contributors and the deployment fix issue

kenglxn/heroku-buildpack-ember-cli,jrr/ember-buildpack,GabKlein/heroku-buildpack-ember-cli,mrship/heroku-buildpack-ember-cli,cordata/heroku-buildpack-ember-cli,mrship/heroku-buildpack-ember-cli,cordata/heroku-buildpack-ember-cli,jrr/ember-buildpack,GabKlein/heroku-buildpack-ember-cli,kenglxn/heroku-buildpack-ember-cli,tonycoco/heroku-buildpack-ember-cli,AltSchool/heroku-buildpack-ember-cli,cordata/heroku-buildpack-ember-cli,tonycoco/heroku-buildpack-ember-cli,kuinak/heroku-buildpack-ember-cli,AltSchool/heroku-buildpack-ember-cli,imipolexg/heroku-buildpack-ember-builder,kenglxn/heroku-buildpack-ember-cli,kuinak/heroku-buildpack-ember-cli,AltSchool/heroku-buildpack-ember-cli,kuinak/heroku-buildpack-ember-cli,GabKlein/heroku-buildpack-ember-cli,nexgen-inquiry/heroku-buildpack-embedded-ember,tonycoco/heroku-buildpack-ember-cli,nexgen-inquiry/heroku-buildpack-embedded-ember,nexgen-inquiry/heroku-buildpack-embedded-ember,mrship/heroku-buildpack-ember-cli,jrr/ember-buildpack