produce more compact result and no longer produces invalid output if input
data contains MEMOIZE opcodes together with PUT or BINPUT opcodes.

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r88546 | alexander.belopolsky | 2011-02-24 14:40:09 -0500 (Thu, 24 Feb 2011) | 3 lines

  Issue #11286: Fixed unpickling of empty 2.x strings.
........

or dumping pickles with a 2.x-compatible protocol, in order to make data
sharing and migration easier. This behaviour can be disabled using the
new `fix_imports` optional argument.

Removed Windows support temporarily.
64bit bug with integer unpickling is now fixed.

  for bytes.  This is the default protocol.  It intentionally cannot
  be unpickled by Python 2.x.

- When a pickle	written	by Python 2.x contains an (8-bit) str
  instance, this is now decoded to a (Unicode) str instance.  The
  encoding used to do this defaults to ASCII, but can be overridden
  via two new keyword arguments to the Unpickler class.  Previously
  this would create bytes instances, which is usually wrong: str
  instances are often used to pickle attribute names etc., and text is
  more common than binary data anyway.

Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552,60554,60556-60559,60561-60562,60569,60571-60572,60574,60576-60583,60585-60586,60589,60591,60594-60595,60597-60598,60600-60601,60606-60612,60615,60617,60619-60621,60623-60625,60627-60629,60631,60633,60635,60647,60650,60652,60654,60656,60658-60659,60664-60666,60668-60670,60672,60676,60678,60680-60683,60685-60686,60688,60690,60692-60694,60697-60700,60705-60706,60708,60711,60714,60720,60724-60734 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r60731 | raymond.hettinger | 2008-02-11 19:51:08 +0100 (Mon, 11 Feb 2008) | 1 line

  No need to register classes that already inherit from ABCs.
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  r60733 | lars.gustaebel | 2008-02-11 20:17:10 +0100 (Mon, 11 Feb 2008) | 2 lines

  Make sure that xstar headers are read correctly.
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  r60734 | raymond.hettinger | 2008-02-11 21:05:53 +0100 (Mon, 11 Feb 2008) | 1 line

  Add tests for pickletools.optimize().
........

this over the weekend, and it made faster & better progress than I
expected -- it's already useful <wink>.