Make object_rep noncopyable.
Make object_rep noncopyable.

This avoids a problem on MSVC, where the copy constructor is generated
by default even though boost::aligned_storage<> is noncopyable.

mapbox/luabind,luabind/luabind,rpavlik/luabind,mdave88/luabind,grafi-tt/luabind,luabind/luabind,lonski/luabind,plsytj/luabind,MrApplejuice/luabind,alex85k/luabind,decimad/luabind-deboostified,rpavlik/luabind,Oberon00/luabind,Wohlhabend-Networks/luabind-deboostified,ltjax/luabind-deboostified,Oberon00/luabind,rpavlik/luabind,alex85k/luabind,alex85k/luabind,luabind/luabind,davidar/luabind,rpavlik/luabind,galek/luabind-deboostified,Kazade/luabind-deboostified,luabind/luabind,alex85k/luabind,rpavlik/luabind