Merge adding predef to index.html.

git-svn-id: http://svn.boost.org/svn/boost/branches/release@85633 b8fc166d-592f-0410-95f2-cb63ce0dd405
Merging recent changes from trunk.

git-svn-id: http://svn.boost.org/svn/boost/branches/release@85636 b8fc166d-592f-0410-95f2-cb63ce0dd405
Wave: Merging from trunk

git-svn-id: http://svn.boost.org/svn/boost/branches/release@85641 b8fc166d-592f-0410-95f2-cb63ce0dd405