Update various libraries' documentation build.

Mostly to use the images and css files under doc/src instead of
doc/html, usually be deleting the settings in order to use the defaults.
Also add 'boost.root' to some builds in order to fix links which rely on
it.

svn path=/trunk/libs/static_assert/; revision=63146
Change PDF URL to SF download page.

svn path=/trunk/libs/static_assert/; revision=67529
Add BOOST_STATIC_ASSERT_MSG

svn path=/trunk/libs/static_assert/; revision=68584
Fix doc typo.
Fixes #6355.

svn path=/trunk/libs/static_assert/; revision=80059