invokemodel API

[fjebaker]

Need a good formal specification of this:

• invokemodel(data, model) -> invoke the model on the same domain as the dataset without folding, but do things like apply data mask etc.
• invokemodel(data, model) |> data -> invoke the model on the same domain as the dataset and then fold through instrument response (less efficient version of using the fitting utility functions)
• invokemodel(domain, model) invoke the model over a domain of values