[boost] [type_traits] extension has_operator_xxx - cv qualifiers and references

New version of the type_traits extension available here: - vault unix newlines: http://www.boostpro.com/vault/index.php?action=downloadfile&filename=type_tr... - vault dos newlines: http://www.boostpro.com/vault/index.php?action=downloadfile&filename=type_tr... - sandbox: http://svn.boost.org/svn/boost/sandbox/type_traits/ This version now handles correctly cv qualifiers and references, which was not the case before. Frédéric