Add ProForma object callback, and add **kwargs to other callbacks

[pksohn]

Just a simple callback in this line, for easier monkey patching, something like:

pf = update_sqftproforma_callback(pf)

Also, add **kwargs to callbacks, like here and [here]

(https://github.com/urbansim/urbansim_parcels/blob/master/urbansim_parcels/utils.py#L732).

(Suggestion by @hanase)