All of program source codes related to external user feature had been removed.
Removed global variables:
This is a big change that spans all of core code and some plugins. This change has been applied to this site. Since I have changed a lot of program, there may be a bug. If you have found a strange place, please report it.
In this change, plugins and themes do not need to worry about the integration with WordPress and other system. Add-on development in PowerQA will be more easy.