perms object is no longer passed to builtins or filters, we use user instead
(it seems that perms content is different with Django 1.2)
#48 : I think I've found a way to include templatetags dynamically, using add_to_builtins.
This is not finished yet. More work than what I expected but the main part is done.
It will need a lot of testing... There is still a bug when activating a new extension
in development mode (ie. with python web server), I think it does not occur behind
a real web server.
Antoine Nguyen