adds basic custom AUTH_USER_MODEL support
makes testsuite use a custom user model if possible
don't link to user admin in menu with AUTH_USER_MODEL
Merging auth_user_model changes
Fixing username changed value
Fixing user changelist
Updating for custom auth_user_model
Merge remote-tracking branch 'upstream/develop' into develop
Updating for auth_user_model
Updating for auth_user_model
Fixing visited link colour
Fixing plugin redirects
Updating migrations for 1.5
Updating css
Updating
Tweaking cms.compat
Fixing migrations
Adding LazyProxy for PageUser
merging with upstream
Updating