There are two dimensions in which model selection searches can vary:

Does the search...

1. use partial_fit or fit?
2. use previous evaluations to choose which models to evaluate?

(adapted from #370 (comment), which is a response to #370 (comment))

I think (1) should be named "incremental" and (2) should be named "adaptive".

Currently, IncrementalSearchCV implements

• a complex adaptive algorithm
• stopping on plateau
• an incremental search that's used with _incremental.fit.

I'd like to clean the naming of IncrementalSearchCV.