Merge pull request #93 from JoshH99/stable

Change pull #91 by ac3xx to use $db->short_title (stable)
Centralizing error handling
Allowing admins to edit posts in closed forums
Reference: http://community.mybb.com/thread-50025.html
Fixes #2023 Maximum Videos per Post setting not working
Fixes #2002 User merge warning logs error
Merge pull request #2 from mybb/stable

mybb/mybb changes pulled in