Log Message:
Changes 3.0.12:
Core support for multiple instances of the same apphook'ed application
The template tag `render_model_add` can now accept a model class as well as a  \ 
model instance
Fixes an issue with reverting to Live mode when moving plugins
Fixes a missing migration issue
Fixes an issue when using the PageField widget
Fixes an issue where duplicate page slugs is not prevented in some cases
Fixes an issue where copying a page didn't copy its extensions
Fixes an issue where translations where broken when operating on a page
Fixes an edge-case SQLite issue under Django 1.7
Fixes an issue where a confirmation dialog shows only some of the plugins to  be \ 
deleted when usingthe "Empty All" context-menu item
Fixes an issue where deprecated 'mimetype' was used instead of 'contenttype'
Fixes an issue where `cms check` erroneous displays warnings when a plugin  uses \ 
class inheritance
Documentation updates