SqftProForma class has [max_retail_height and max_industrial_height attributes](https://github.com/urbansim/developer/blob/master/developer/sqftproforma.py#L106-L109); these should be generalized to a `max_height` attribute which is a dictionary, e.g.: ```python max_height = {"retail": 2, "industrial": 2} ``` (Suggestion by @hanase)
SqftProForma class has max_retail_height and max_industrial_height attributes; these should be generalized to a
max_heightattribute which is a dictionary, e.g.:(Suggestion by @hanase)