kenwheeler/slick — pull request #660 by danReynolds (2014-10-15 18:55:43+00:00)
Title: include self and parents

Came across this issue, at the moment if you are a div with the `slick-slide` class directly, then it will look for your parents and not find you. Closest resolves this issue and is comparable to parents: http://api.jquery.com/closest/