Group dynamically generated menu items
Also allow for grouping other views by setting the 'sidebar_grouping'
param to a value another than 'main'.
Patch by: Sverre Rabbelier
"Decorator for views that gzips pages if the client supports it."
from django.utils.decorators import decorator_from_middleware
from django.middleware.gzip import GZipMiddleware
gzip_page = decorator_from_middleware(GZipMiddleware)