make download_feeds into Feed instance method
make download into background process
resolving merge conflicts
more granular status updates in downloadworker
refactor to put more code in model, use AR callbacks for saving
fix merge conflicts
continue refactor, parse feed upon create, do stuff upon enclosure status change
only extract metadata if we haven't already
delete file from server after upload finishes
Merge pull request #19 from schbetsy/download_in_background

Download in background