add method on Scaper model to get downloads for that scraper
add method on Scaper model to get downloads for that scraper

otherchirps/morph,otherchirps/morph,openaustralia/morph,otherchirps/morph,openaustralia/morph,otherchirps/morph,openaustralia/morph,openaustralia/morph,otherchirps/morph,otherchirps/morph,openaustralia/morph,otherchirps/morph,openaustralia/morph,openaustralia/morph