Return on invalid feed
Add valid flag to valid feeds"
Change update scope

Only pull in feeds that are currently valid. Need to create
worker to check validity of feeds after a period of time in
case feed has been reactivated.
typo: fix column name
Return after feed has been updated
Set timeout to 15 seconds on feed fetch
Remove timeout, causing strange errors
Add scope for favicon update
Escape favicon pull on http timeout
Throw validation errors on update feed