Added csv download into detail aggregate api endpoint.
Added csv download into detail aggregate api endpoint.

dssg/plenario,tosseto/plenario,tosseto/plenario,UrbanCCD-UChicago/plenario,dssg/plenario,UrbanCCD-UChicago/plenario,tosseto/plenario,dssg/plenario,UrbanCCD-UChicago/plenario