Custom css for touch devices using modernizr

for issue #2 I created a class at the bottom of styles.less that looks for .touch as a class in html, which modernizr puts there. I made a custom modernizr file [here](http://modernizr.com/download/) that included a couple more things, but not a lot, so if we want to use it more, we need to add more checks to the js file.

It's also included in the head, which I know can sometimes slow the initial load, but it's recommended being there since it deals so much with page rendering.