Merged revisions 1884-1905 via svnmerge from

Merged revisions 1884-1905 via svnmerge from
http://scons.tigris.org/svn/scons/branches/core

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  r1891 | stevenknight | 2007-04-24 08:57:03 -0500 (Tue, 24 Apr 2007) | 1 line

  0.96.D632 - Fix 0.96.96 reference count regression during parallel builds.
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  r1892 | stevenknight | 2007-04-24 12:51:05 -0500 (Tue, 24 Apr 2007) | 1 line

  0.96.D633 - Fix documented default value(s) of $MSVS_USE_MFC_DIRS.
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  r1893 | stevenknight | 2007-04-24 16:12:14 -0500 (Tue, 24 Apr 2007) | 1 line

  0.96.D634 - Make the DirEntryScanner tolerant of non-Dir nodes.
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  r1898 | stevenknight | 2007-05-09 15:07:15 -0500 (Wed, 09 May 2007) | 1 line

  0.96.D635 - Portability fixes in test scripts.
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  r1899 | stevenknight | 2007-05-12 08:19:13 -0500 (Sat, 12 May 2007) | 1 line

  0.96.D636 - Update documentation with rudimentary Tool module descriptions.
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  r1901 | stevenknight | 2007-05-17 14:32:14 -0500 (Thu, 17 May 2007) | 1 line

  0.97.D001 - Initialize 0.97 for release.
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git-svn-id: http://scons.tigris.org/svn/scons/trunk@1907 fdb21ef1-2011-0410-befe-b5e4ea1792b1