Merge changelog updates.

Merged revisions 45156-45157 via svnmerge from 
https://svn.boost.org/svn/boost/branches/unordered/trunk

........
  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.
........


[SVN r45274]

libs/functional

@@ -1 +1 @@
-Subproject commit ab9f98e4dce298d742c390b4afdcb7f026988a2d
+Subproject commit 58f74fb524b08efd9cc7a61f309fd6b346201216

libs/unordered

@@ -1 +1 @@
-Subproject commit 980d3f87c5939d7cc82eeee759bea2771f442746
+Subproject commit e1630b27cf904b721b5fe5c094d48ab3d02c09a1