DjangoContext should fill in the request itself into the context

[hugo]

This would allow accessing GET, POST or META stuff in the templates without the view function taking care of it. For example if using a login_required decorator, you could just put a <input type="hidden" name="next" value="{{ request.path }}" /> into the login.html template and have it automatically redirect to the secured form. Currently you need to pass the 'next' parameter to the form itself and use that to build the next field. And it's currently impossible to pass on request parameters to the logged in page.