Select example clips the dropdown

[Ciantic]

It didn't begin well for me, first example seems to be working incorrectly.

1. Open http://github.hubspot.com/select/docs/welcome/
2. Shrink the browser vertically to about the size in the screenshot and open the dropdown.
3. Notice that it's not possible to select the topmost items because they are clipped and one can't scroll there.

Lot's of people view the web from what is basically a mail slot sized hole, I know it's ridiculous, but that is the way it is.

I think it should not expand the floating area topwards out of the window (since one can't scroll there).