Thread: remove noexcept on operations that can unlock the mutex.

svn path=/trunk/boost/thread/; revision=83902
Thread: apply patch for #6843.

svn path=/trunk/boost/thread/; revision=83904
Thread: Added Move traits include file.

svn path=/trunk/boost/thread/; revision=83906
Thread: #6966.

svn path=/trunk/libs/thread/; revision=83908
Thread: update history.

svn path=/trunk/libs/thread/; revision=83910