lede/lead add to headings
Update _browsers.scss
Update _responsive-headings.scss

$use-responsive should be $responsive
Update _responsive-marginpadding.scss

@mixin cannot be inside @if
Update _mixins.scss

milli in stead of mili
Update _browsers.scss

added closing }
Update _defaults.scss

it's the invisible man
removed outcommented imports
Added comments for detection of box-sizing.
Changed default value of $no-box-sizing-class

Now it's conform the modernizr-classname.
Initial
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md