commented out unnecessary build tasks
combined media queries
corrected image reference that was failing "grunt build"
now referencing Google for the fonts in the demo pages
update to latest version
simplified matchViewport function and removed font-family on head workaround
updated CSS and JS references to match new structure
updated to Modernizr 2.7.1
vendor prefixes aren't very useful here: http://caniuse.com/background-img-opts
added IEMobile here just in case

Because the Guardian's approach is probably better than mine:
http://www.theguardian.com/info/developer-blog/2013/oct/14/mobile-first-
responsive-ie8
now using jQuery 2.x