rename self.present_collection -> self.collection_to_hash
rename self.present_collection -> self.collection_to_hash

splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb