Merge pull request #260 from timhudson/fix-scss-var-in-less

Fixed incorrect variable syntax

library/less/_base.less

@@ -35,7 +35,7 @@ and will be used across all viewports.
 *********************/
 
 body {
-	font-family: $serif;
+	font-family: @serif;
 	font-size: 100%;
 	line-height: 1.5;
 	color: #565656;