Merge pull request#447 from ubclaunchpad/cheukyin699/fix-iquit-dupesFix duplicate user appearing on i-quit msg

Filter out archived channels from selector (#418)Filter out archived channels from selector

Fix for iOS converting double-hyphens to dashes (#399)Fix for iOS converting double-hyphens to dashes

Merge pull request#372 from ubclaunchpad/rmcreyes/#368-fix-mem-webhooksAllow membership webhooks to make writes to the db