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diff --git a/library/font_awesome/src/assets/less/mixins.less b/library/font_awesome/src/assets/less/mixins.less
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+++ b/library/font_awesome/src/assets/less/mixins.less
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+.gradient-text (@color: #808080, @color1: #999, @color2: #B3B3B3, @color3: #B3B3B3, @color4: #666) {
+    // fallback for browsers that don't support this
+//    color: @color;
+
+    // makes simple gradient text in webkit browsers
+//    background: -webkit-gradient(linear, left top, left bottom, from(@colorTop), to(@colorBottom));
+
+    // makes a more complex background, allowing iPhone-like text gradients
+    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, @color1), color-stop(55%, @color2), color-stop(55%, @color3), color-stop(100%, @color4)); // Safari 4+, Chrome 2+
+    background-image: -webkit-linear-gradient(top, @color1 0%, @color2 55%, @color3 55%, @color4 100%); // Safari 5.1+, Chrome 10+
+
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+}
+
+// Mixin for generating button backgrounds
+// ---------------------------------------
+.buttonBackgroundThreeColors(@startColor, @midColor, @colorStop, @endColor) {
+  // gradientBar will set the background to a pleasing blend of these, to support IE<=9
+  #gradient > .vertical-three-colors(@startColor, @midColor, @colorStop, @endColor);
+  border-color: @startColor @startColor darken(@endColor, 15%);
+  border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
+
+  .reset-filter();
+
+  // in these cases the gradient won't cover the background, so we override
+  &:hover, &:active, &.active, &.disabled, &[disabled] {
+    background-color: @endColor;
+  }
+
+  // IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
+  &:active,
+  &.active {
+    background-color: darken(@endColor, 10%) e("\9");
+  }
+}
+
+.icon-size (@size: 14px, @width-multiplier: .9, @height-multiplier: 1) {
+  i { font-size: @size; }
+  line-height: @size * 1.1;
+  height: @size * @height-multiplier * 1.05;
+  text-align: center;
+}
+
+.sticky-footer (@footer-height: @baseLineHeight * 4, @footer-padding-top: 70px, @footer-padding-bottom: 70px, @footer-margin-top: 70px) {
+  .wrapper {
+    margin: 0 auto -(@footer-height + @footer-padding-bottom + @footer-padding-top + @footer-margin-top + 1);
+  }
+  .push {
+    height: @footer-height + @footer-padding-bottom + @footer-padding-top + @footer-margin-top + 1;
+  }
+
+  .footer {
+    margin-top: @footer-margin-top;
+    height: @footer-height;
+    padding: @footer-padding-top 0 @footer-padding-bottom;
+  }
+}