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/less/mixins.less

@@ -1,48 +1,20 @@
 // Mixins
 // --------------------------
 
-.icon(@icon) {
-  .icon-FontAwesome();
-  content: @icon;
+.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);
 }
 
-.icon-FontAwesome() {
-  font-family: FontAwesome;
-  font-weight: normal;
-  font-style: normal;
-  text-decoration: inherit;
-  -webkit-font-smoothing: antialiased;
-  *margin-right: .3em; // fixes ie7 issues
-}
-
-.border-radius(@radius) {
-  -webkit-border-radius: @radius;
-  -moz-border-radius: @radius;
-  border-radius: @radius;
-}
-
-.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;
-    }
-  }
+.fa-icon-flip(@horiz, @vert, @rotation) {
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation, mirror=1);
+  -webkit-transform: scale(@horiz, @vert);
+     -moz-transform: scale(@horiz, @vert);
+      -ms-transform: scale(@horiz, @vert);
+       -o-transform: scale(@horiz, @vert);
+          transform: scale(@horiz, @vert);
 }