Use validates_uniqueness_of instead of custom validator
Flip order in scoped validates_uniqueness_of
Make spring watch .env file
Fix visited status creation race condition
Don't delete failed jobs.
Always return 200 or 406 to Mailgun so that it knows not to retry
Remove accidental pinned thread database stuff
Revert "Remove accidental pinned thread database stuff"

This reverts commit 35b29a39e7920bbbb4d7d9460031fdeec139120f.
Fix email webhooks controller test
Remove thread.pinned in a migration
Lock visited status update on user id and thread id, not post id
Better visited status lock test
Upgrade delayed_job_active_record
Reload classes in delayed job in development

Also refactor SilenceDelayedJobQueries.
Reformat acknowledgements
Subforum index: row layout instead of tiles
Merge branch 'master' of https://github.com/hackerschool/community
Fix timestamp in subforum view
Turn top border for subforums on index into a div
Add descriptions to subforums