Fix permission error on Heroku
Fix permission error on Heroku

see https://stackoverflow.com/questions/10990104/how-to-rake-dbdrop-and-rake-dbcreate-on-heroku

chrisma/event-und-raumplanung,hpi-swt2/event-und-raumplanung,chrisma/event-und-raumplanung,hpi-swt2/event-und-raumplanung,chrisma/event-und-raumplanung