More explicit comments

less/00-config.less

@@ -49,7 +49,7 @@
 @ultra-large-screen		: 1600px; // ultra large screens media query
 
 // misc
-@gutter		: 20px; // gutter value (%, px, em, rem) for grid layouts
+@gutter		: 20px; // gutter value for grid layouts. Unit can be: %, px, em, rem
 
 // LESS mixins : don't touch or you'll be banned ;)
 // px to em/rem 

less/01-base.less

@@ -1,6 +1,6 @@
 @import "00-config";
 /*!
-* www.KNACSS.com V3.0.3 (2014-05-019) @author: Raphael Goetter, Alsacreations
+* www.KNACSS.com V3.0.3 (2014-05-19) @author: Raphael Goetter, Alsacreations
 * Licence WTFPL http://www.wtfpl.net/
 */
 
@@ -185,7 +185,7 @@ sup {
 /* == hiding content             */
 /* ----------------------------- */
 
-/* hidden but not for assistance tools, Yahoo! method */
+/* hidden but not for an assistive technology like a screen reader, Yahoo! method */
 .visually-hidden { 
 	position: absolute !important;
     border: 0 !important;

less/11-ie.less

@@ -70,6 +70,7 @@
 		*zoom: 1;
 	}
 	
+	/* old syntax of clip for IE6/IE7 */
 	.visually-hidden { 
 		*clip: rect(1px 1px 1px 1px); 
 	}