Blocked revisions 78738,78743 via svnmerge

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  r78738 | benjamin.peterson | 2010-03-06 14:34:14 -0600 (Sat, 06 Mar 2010) | 1 line

  bump version to 2.7a4
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  r78743 | benjamin.peterson | 2010-03-06 16:44:07 -0600 (Sat, 06 Mar 2010) | 1 line

  post release update
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