Merged revisions 64285-64735 via svnmerge from

Merged revisions 64285-64735 via svnmerge from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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  r64493 | benjamin.peterson | 2008-06-24 04:14:14 +0200 (Di, 24 Jun 2008) | 1 line

  add a fix_import mapping for cPickle -> pickle
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  r64651 | brett.cannon | 2008-07-02 04:00:11 +0200 (Mi, 02 Jul 2008) | 3 lines

  Update fix_imports for urllib. Had to change the fixer itself to handle modules
  that are split across several renames in 3.0.
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  r64669 | brett.cannon | 2008-07-02 21:43:48 +0200 (Mi, 02 Jul 2008) | 4 lines

  Backing out last change until fix_imports is working again. Also re-enable the
  testing for fix_imports; if it is deemed that it takes too long to run then a
  random sample should be taken and used to test it.
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