Allow custom equals comparer function for `object/equals`
Refactor `object/deepEquals` and allow custom comparer function
Stricter non-object behavior in `object/equals`
Explain `callback` option in `object/deepEquals` better
Update changelog
Simplify `object/equals` default comparer
Merge pull request #71 from conradz/equals-comparer

Allow custom comparer function in `object/equals` and `object/deepEquals`