Do we need shallowEqualScalar?

[gaearon]

This is to discuss reduxjs/redux#204 which is not relevant to Redux repo anymore but relevant to this repo.

Might want to take another look at it after finishing with #1.

[gaearon]

Not relevant anymore because of #16.

[gaearon]

Actually, still relevant, but I'm convinced we're doing it for good reasons: reduxjs/redux#204 (comment).