Log Message:
Changes 3.0.13:
Numerous documentation updates especially for installation and the tutorial
Numerous improvements to translations
Improves reliability of apphooks
Improves reliabiliy of Advanced Settings for pages when using apphooks
Allow page deletion after template removal
Improves upstream caching accuracy
Improves CMSAttachMenu registration
Improves handling of mistyped URLs
Improves redirection as a result of changes to page slugs, etc.
Improves performance of "watched models"
Improves frontend performance relating to resizing the sideframe
Corrects an issue where items might not be visible in structue mode menus
Limits version of django-mptt used in CMS for 3.0.x
Prevent accidental upgrades to Django 1.8, which is not yet supported