Add empty class definitions for Icon, Marker to be filled in as part of bugs #5 and #6 respectively

git-svn-id: http://svn.openlayers.org/trunk/openlayers@85 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Icon.js

@@ -0,0 +1,13 @@
+OpenLayers.Icon = Class.create();
+OpenLayers.Icon.prototype = {
+    
+    // string: image url
+    url: null,
+    
+    // {OpenLayers.Size}: size of image
+    size:null,
+    
+    initialize: function() {
+        
+    }
+}