#230 Auto generate country dropdown

Used to evaluate the progess on this issue so far
This is still incorrect; `bind` is order-sensitive. As written currently, you're binding the field name to the `event` param in `_handleCountryChange`. Check out some articles on currying, and what `bind` does. Here's one I found: http://kishorelive.com/2012/02/06/currying-in-javascript-using-bind/