Adds `is_downloadable` flag
Adds `is_downloadable` flag

broskoski/metaphysics,craigspaeth/metaphysics,artsy/metaphysics,mzikherman/metaphysics-1,mzikherman/metaphysics-1,artsy/metaphysics,mzikherman/metaphysics-1,artsy/metaphysics,1aurabrown/metaphysics,mzikherman/metaphysics-1,craigspaeth/metaphysics