Merge changelog updates.
Merged revisions 45156-45157 via svnmerge from https://svn.boost.org/svn/boost/branches/unordered/trunk
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r45156 | danieljames | 2008-05-05 21:32:40 +0100 (Mon, 05 May 2008) | 1 line
Update the changelog.
r45157 | danieljames | 2008-05-05 21:32:57 +0100 (Mon, 05 May 2008) | 1 line
Add a changelog for unordered.