JedWatson/react-select — pull request #27 by jacobdfriedmann (2014-12-10 14:10:21+00:00)
Title: Ref #25 - Allows numbers (not just strings) as option labels and values.

If a multi-select, passes an array to the onChange function (instead of concatenated string)
which is empty when nothing is selected.

If a single select, passes the single value to the onChange function and null if nothing
is selected.