Adds responsive image creation from _img folder
Changes to use smaller images
Adds grunt-replace so I can add elements to the page for testing during grunt serve
Adds visual indicator for screen width with `grunt serve`
Fixed issue where replace was not running after files were altered by watch
Adds div.wrapper for styling later
Changes clear fix to a different implementation

The clearfix that defaults with Compass disallows overflowed elements.
Calling pie-clearfix works with overflows.