Added Survey From Field validation.
Also added the COMMENT_PREFIX in Survey model to ensure that comments are stored in the same way everwhere.
Reviewed by: Lennard de Rijk
"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)