Added a simple Page.has_children method, useful in a specific menu logic.
Merge branch 'feature/custom-model-labels-in-admin-menu' into develop
Merge branch 'feature/default-menus-forced-to-unicode-fix' into develop
Merge branch 'master' into feature/modeltranslation-integration

Conflicts:
	mezzanine/core/admin.py
	mezzanine/core/templates/base.html
Merge branch 'feature/search-form-go-vs-admin-go' into develop
Merge branch 'feature/translatable-site-permissions' into develop
Merge branch 'feature/urls-defaults-deprecation' into develop
Merge branch 'feature/modeltranslation-integration' into develop

Conflicts:
	mezzanine/project_template/urls.py
Merge branch 'feature/polish-translation-update' into develop
Merge branch 'feature/page-has-children' into develop
Merge branch 'master' into feature/modeltranslation-integration

Conflicts:
	mezzanine/core/admin.py
	mezzanine/core/templates/base.html
Merge branch 'feature/modeltranslation-integration' into develop

Conflicts:
	mezzanine/core/admin.py
Merge branch 'feature/modeltranslation-integration' into develop

Conflicts:
	mezzanine/core/admin.py