Im trying to use Flexbox. http://css-tricks.com/almanac/properties/a/align-content/ this shows nice alignment options; but i would actually want a Top-top-bottom situation.
I'm a bit late to the party, but might be relevant for others trying to accomplish the same you should be able to do:
margin-top: auto
on the element in question and it should go to the bottom. Should do the trick for firefox, chrome and safari.