Apply tag classes to vertices and points

While here, introduce a `classed` matcher for Chai.

test/index_packaged.html

@@ -24,6 +24,8 @@
         var expect = chai.expect;
     </script>
 
+    <script src="spec/spec_helpers.js"></script>
+
     <!-- include spec files here... -->
     <script src="spec/actions/add_node.js"></script>
     <script src="spec/actions/add_way.js"></script>
@@ -57,6 +59,7 @@
     <script src="spec/renderer/hash.js"></script>
     <script src="spec/renderer/map.js"></script>
 
+    <script src="spec/svg/points.js"></script>
     <script src="spec/svg/vertices.js"></script>
     <script src="spec/svg/tag_classes.js"></script>