SCSS Framework

Added modernizr script to image Cover example
Added Aspect Ratio variables
Fixed image->fit aspect ratio to w/h instead of h/w
Added impotrant to width/height in image ->cover

TODO vertical center mixin

mixins/layout/image/_aspect-ratios.scss

@@ -0,0 +1,5 @@
+$ASPECT-CINEMASCOPE: 2.35/1;
+$ASPECT-SUPERSCOPE: 2/1;
+$ASPECT-THIRTYFIVE-MM: 1.35/1;
+$ASPECT-THIRTYFIVE-MM-BROAD: 1.85/1;
+$ASPECT-SQUARE: 1.85/1;