Fixes for better docs generation.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83873 b8fc166d-592f-0410-95f2-cb63ce0dd405
Fixes to get the float128 tests passing with Intel C++ 13.0.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83874 b8fc166d-592f-0410-95f2-cb63ce0dd405
Add a few more cases.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83875 b8fc166d-592f-0410-95f2-cb63ce0dd405