Update doc with last modifications from Concurrent TS.
Update doc with last modifications from Concurrent TS.
update changes and compliance with last fixed issues.
Avoid the use fo invoke if not available, even if the semantics is not the same.
remove warning.
fix typo on file guard.
Remove confusing  may be  remark and replace T by FutTypes.
Add missing invoke.hpp include.
remove BOOST_THREAD_NO_CXX11_DECLTYPE_N3276.