Support of nested namespaced URLconfs in hooked apps.
Also added ability to exclude some namespaced URLs from cms_perms decoration.
Don't set namespaces in first level of nested URLconfs.
Added test case for exclude_permissions feature of CMSApp.
Support of nested namespaced URLconfs in hooked apps.
Also added ability to exclude some namespaced URLs from cms_perms decoration.
Don't set namespaces in first level of nested URLconfs.
Added test case for exclude_permissions feature of CMSApp.
Fixed rebase conflicts.
Remove unused import sys in appresolver.
Docs for exclude_permissions property of apphooks.
Merge branch 'feature/appresolver_improvements' of https://github.com/vovanbo/django-cms into feature/appresolver_improvements

Conflicts:
	cms/appresolver.py
Fix typo
Merge pull request #3374 from yakky/fix_if

Fix typo
Merge pull request #3276 from vovanbo/feature/appresolver_improvements

Support of nested namespaces in URLconfs in hooked apps