upgrade to ruby 2.0.0
 update ruby version
Display tag sub update info on delayed jobs page
fixes #530
fixes #1124
fix iqdb callback
fix metatags not working
iqdb fixes
fix iqdb match constraint
fixes #2116
enable iqdb previews in upload page
implement oob gc for unicorn
Fix issue when deleting unread dmail
Fix marking all dmails as read not working fully
Add unread dmail search option
Potential improvement for #read_by?
fixes #2126

explicitly stated run "chmod 600 ~/.danbooru/secret_token" and run "chmod 600 ~/.danbooru/session_secret_key" related to 03e8906b09ff1085d9b8d4bf7e96cbb7ad2ba1c6 (issue #1366)
Use transaction when favoriting to prevent post from being half-favorited
Merge branch 'master' of https://github.com/r888888888/danbooru
fixes #2108, upgrade to postgresql 9.3, fix tests