Merged revisions 88004,88006,88235 via svnmerge from

Merged revisions 88004,88006,88235 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r88004 | ned.deily | 2011-01-14 20:44:12 -0800 (Fri, 14 Jan 2011) | 4 lines

  #10907: Update OS X installer build README to better reflect
          current build practices.
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  r88006 | ned.deily | 2011-01-14 21:29:12 -0800 (Fri, 14 Jan 2011) | 6 lines

  #10843: Update third-party library versions used in OS X 32-bit
          installer builds: bzip2 1.0.6, readline 6.1.2, SQLite 3.7.4
          (with FTS3/FTS4 and RTREE enabled), and ncursesw 5.5 (wide-char
          support enabled).
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  r88235 | ned.deily | 2011-01-29 10:56:28 -0800 (Sat, 29 Jan 2011) | 5 lines

  Issue #11054: Allow Mac OS X installer builds to again work on 10.5 with
  the system-provided Python.  Also, properly guard a new Python 3 only
  installer build step so that build-installer.py can stay compatible
  with the 2.7 version.  (with release manager approval for 3.2rc2)
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