cleaned up the styles to remove similar WET styles
cleaned up follow markup
Fixed the empty media queries not being removed
Fixed by updating the grunt-contrib-cssmin node module
Merge pull request #643 from shawnthompson/styles

cleaned up the styles to remove similar WET styles
Merge pull request #644 from shawnthompson/follow-markup

cleaned up follow markup
Merge pull request #646 from LaurentGoderre/fix-css-min

Fixed the empty media queries not being removed