Merged revisions 1540-1545,1547-1581 via svnmerge from

Merged revisions 1540-1545,1547-1581 via svnmerge from
http://scons.tigris.org/svn/scons/branches/core

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  r1543 | stevenknight | 2006-07-25 20:37:19 -0400 (Tue, 25 Jul 2006) | 3 lines

  Initialized merge tracking via "svnmerge" with revisions "1-1502" from
  http://scons.tigris.org/svn/scons/branches/sigrefactor
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  r1558 | stevenknight | 2006-07-28 22:43:38 -0400 (Fri, 28 Jul 2006) | 2 lines

  Ignore *.pyc files in the QMTest subdirectory.
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  r1561 | stevenknight | 2006-07-29 07:16:14 -0400 (Sat, 29 Jul 2006) | 3 lines

  Fix the infrastructure that tests runtest.py itself when the
  wrapping runtest.py is run directly, not through Aegis.
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  r1580 | stevenknight | 2006-08-06 15:00:06 -0400 (Sun, 06 Aug 2006) | 1 line

  0.96.D428 - Support cleaning and scanning target files generated by SWIG. (Arve Knudsen)
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  r1581 | stevenknight | 2006-08-06 15:40:20 -0400 (Sun, 06 Aug 2006) | 1 line

  0.96.D429 - Use zipimport as a fallback when importing modules so SCons can use py2exe's all
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git-svn-id: http://scons.tigris.org/svn/scons/trunk@1582 fdb21ef1-2011-0410-befe-b5e4ea1792b1