Changed the Vertex class to inherit from list

- allows for simpler jsonification

surf/subd/cc.py

@@ -88,10 +88,11 @@ def refine(mesh):
 
 
 if __name__ == '__main__':
+    import sys
     import json
     from surf.subd.cc import refine
-
-    cube = json.load(open('blender/samples/cube.json', 'r'))
+    input_file_name = sys.argv[1]
+    cube = json.load(open(input_file_name, 'r'))
     p = PolygonMesh(**cube)
     q = refine(p)
-    print json.dumps({'vertices': [list(v) for v in q.vertices]})
+    print q