[boost] [1.35.0] Web site fixes needed

I've just added three web site items to the web site do list (http://svn.boost.org/trac/boost/wiki/MergeOneDotThreeFiveDotZero): * www.boost.org/libs should redirect to the current library docs page. * The "Documentation" sidebar entry links to an empty page. * The "Documentation" sidebar expansion does not list 1.35.0. --Beman