Supoer multiple parsers, specifically for Python2 and Python3. In the

process some OO cleanup and some global variable hacks removed.

test/simple-uncompyle-code-test.py

@@ -5,14 +5,6 @@ from __future__ import print_function
 from uncompyle6 import uncompyle
 import sys, inspect
 
-if (sys.version_info > (3, 0)):
-    from io import StringIO
-else:
-    from StringIO import StringIO
-
-from collections import namedtuple
-NodeInfo = namedtuple("NodeInfo", "node start finish")
-
 def uncompyle_test():
     frame = inspect.currentframe()
     try: