Merge pull request #486 from ethanresnick/refresh-bugfi

When calling refresh, make sure to clean DOM elements which are no longer skrollables.

src/skrollr.js

@@ -350,6 +350,11 @@
 			//The edge strategy for this particular element.
 			var edgeStrategy = _edgeStrategy;
 
+			// If we're reseting the counter, remove any old element ids that may be hanging around.
+			if(ignoreID) {
+				delete el[SKROLLABLE_ID_DOM_PROPERTY];
+			}
+
 			if(!el.attributes) {
 				continue;
 			}
@@ -1690,4 +1695,4 @@
 		window.skrollr = skrollr;
 	}
 
-}(window, document));
+}(window, document));