tevko/wp-tevko-responsive-images — pull request #7 by micahmills (2014-04-17 21:45:19+00:00)
Title: Added matchmedia.js (https://github.com/paulirish/matchMedia.js/) to all...

I used this on a project today and had to add matchMedia.js to get picturefill to work in IE9. It would save other people the trouble or sorting out why they didn't have images in IE9 if it was included.