fixed issue 51

Author: adamwulf

src/jquery.columnizer.js

@@ -166,7 +166,11 @@
 			if($pullOutHere.children().length){
 				$cloneMe = $pullOutHere.children(":first");
 				$clone = $cloneMe.clone(true);
-				if($clone.prop("nodeType") == 1 && !$clone.hasClass("dontend")){ 
+				//
+				// need to support both .prop and .attr if .prop doesn't exist.
+				// this is for backwards compatibility with older versions of jquery.
+				if(($clone.prop && $clone.prop("nodeType") == 1 && !$clone.hasClass("dontend")) ||
+				   ($clone.attr("nodeType") == 1 && !$clone.hasClass("dontend"))){ 
 					$putInHere.append($clone);
 					if($clone.is("img") && $parentColumn.height() < height + 20){
 						$cloneMe.remove();