Add missing 3 public functions in scales-utils.js that were not included in the original PR.
Add missing 3 public functions in scales-utils.js that were not included in the original PR.

uber/react-vis,Apercu/react-vis,Apercu/react-vis,uber-common/react-vis,uber/react-vis,Apercu/react-vis,uber/react-vis,uber-common/react-vis