Update to Font Awesome 4.0.3

This will require you to change any icons that use the "icon-iconname"
format. Please consult the FontAwesome docs for more info.

stylesheets/font-awesome/scss/_mixins.scss

@@ -1,48 +1,20 @@
 // Mixins
 // --------------------------
 
-@mixin icon($icon) {
-  @include icon-FontAwesome();
-  content: $icon;
+@mixin fa-icon-rotate($degrees, $rotation) {
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
+  -webkit-transform: rotate($degrees);
+     -moz-transform: rotate($degrees);
+      -ms-transform: rotate($degrees);
+       -o-transform: rotate($degrees);
+          transform: rotate($degrees);
 }
 
-@mixin icon-FontAwesome() {
-  font-family: FontAwesome;
-  font-weight: normal;
-  font-style: normal;
-  text-decoration: inherit;
-  -webkit-font-smoothing: antialiased;
-  *margin-right: .3em; // fixes ie7 issues
-}
-
-@mixin border-radius($radius) {
-  -webkit-border-radius: $radius;
-  -moz-border-radius: $radius;
-  border-radius: $radius;
-}
-
-@mixin icon-stack($width: 2em, $height: 2em, $top-font-size: 1em, $base-font-size: 2em) {
-  .icon-stack {
-    position: relative;
-    display: inline-block;
-    width: $width;
-    height: $height;
-    line-height: $width;
-    vertical-align: -35%;
-    [class^="icon-"],
-    [class*=" icon-"] {
-      display: block;
-      text-align: center;
-      position: absolute;
-      width: 100%;
-      height: 100%;
-      font-size: $top-font-size;
-      line-height: inherit;
-      *line-height: $height;
-    }
-    .icon-stack-base {
-      font-size: $base-font-size;
-      *line-height: #{$height / $base-font-size}em;
-    }
-  }
+@mixin fa-icon-flip($horiz, $vert, $rotation) {
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
+  -webkit-transform: scale($horiz, $vert);
+     -moz-transform: scale($horiz, $vert);
+      -ms-transform: scale($horiz, $vert);
+       -o-transform: scale($horiz, $vert);
+          transform: scale($horiz, $vert);
 }