Merge changes from sandbox to documentation.
Puts all Math docs in one big whole with separate chapters for each part.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84294 b8fc166d-592f-0410-95f2-cb63ce0dd405
geometry.index docs: experimental features commented, sections replaced by headings in queries description

git-svn-id: http://svn.boost.org/svn/boost/trunk@84296 b8fc166d-592f-0410-95f2-cb63ce0dd405
Update doc history, regenerate.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84297 b8fc166d-592f-0410-95f2-cb63ce0dd405
Enable handler type requirements static_assert on clang.


git-svn-id: http://svn.boost.org/svn/boost/trunk@84301 b8fc166d-592f-0410-95f2-cb63ce0dd405
Add new traits classes, handler_type and async_result, that allow
the customisation of the return type of an initiating function.


git-svn-id: http://svn.boost.org/svn/boost/trunk@84308 b8fc166d-592f-0410-95f2-cb63ce0dd405
Fix handling of geometry in process_jam_log.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84309 b8fc166d-592f-0410-95f2-cb63ce0dd405
Add a comment about `__GNUC__` macro in clang

git-svn-id: http://svn.boost.org/svn/boost/trunk@84310 b8fc166d-592f-0410-95f2-cb63ce0dd405