little bit of python2.5 compatibility

builtin.py

@@ -2,6 +2,7 @@ import re
 import sys
 import os
 import types
+if sys.hexversion >= 0x03000000:
     import io
 import inspect
 

parsing.py

@@ -28,7 +28,7 @@ Ignored statements:
  - print (no use for it, just slows down)
  - exec (dangerous - not controllable)
 """
-from _compatibility import next, literal_eval, tokenize_func, BytesIO
+from _compatibility import next, literal_eval, tokenize_func, BytesIO, property
 
 import tokenize
 import re