[boost] [core] [noncopyable] Add nonmoveable?

In addition to noncopyable, I sometimes want to force classes to be nonmoveable as well (mainly node-type classes in tree structures which other classes point to). Therefore I'd suggest adding a cousin to noncopyable; boost::nonmoveable which simply prevents an instance to be nonmoveable (as well as noncopyable). Note; even due the delete modifier were added in C++11 I still think inheriting boost:noncopyable\nonmoveable syntactically nicer than manually marking the copy\move constructors\assignment operators delete. /Viktor Sehr