Blocked revisions 71096 via svnmerge

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  r71096 | eric.smith | 2009-04-03 10:45:06 -0400 (Fri, 03 Apr 2009) | 9 lines

  Added ',' thousands grouping to int.__format__. See PEP 378.

  This is incomplete, but I want to get some version into the next alpha. I am still working on:
  Documentation.
  More tests.
  Implement for floats.

  In addition, there's an existing bug with 'n' formatting that carries forward to thousands grouping (issue 5515).
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