Include the field_id in the context of _as_table_helper
This makes it possible to refer to the field that is being edited by
it's ID (in for example Javascript).
Patch by: "Mario Ferraro" <fadinlight@gmail.com>
"""Multi-consumer multi-producer dispatching mechanism
Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.
Heavily modified for Django's purposes.
"""
from django.dispatch.dispatcher import Signal