Replace all uses of boost/utility.hpp with more-granular includes.  Solves modularization dependency nightmare.
Apply patch for #4999
Make Boost.Signals play nice with VC11; patch by Daniela Engert
Add note and FAQ indicating that Boost.Signals is no longer maintained
Add deprecation warning to signal.hpp; turn off warning in tests suite
Better markup for signals deprecation.

Put it in a 'note', and use boostbook ids for links, so that they will link to
local files.
Fix badly formed xml.