A significant number of users will be basically hitting tab in iPython and seeing what comes up. I'm +1 for renaming such that the first word groups all functions with similar utility.

That seems to be the preferred style in `scipy.ndimage` as well: `binary_*`, `distance_*`, etc.

If we go down this road, for most casts it's probably best to go `[noun]_[descriptor(s)]`. For instance, `enhance_contrast` might group with `enhance_anythingelse`, but `contrast_enhancement` would group only with any future contrast modifying functions.