OpenAll - 5.3 [Fan Update] (7.4)

Fan Update of OpenAll addon.

Changes

Version 7.4
1] 5.3 Pandaria Ready.

Version 7.3
1] 5.0.4 Pandaria Pre-Patch Compatibility.

Version 7.2
1] Some texts changed.

Version 7.1
1] Fixed Minimap Icon when there aren't any mails in mailbox.
2] 4.3 Compatibility.