[boost] [exception] c++11 updates

I've been working with boost exception and looking at the develop branch on github it looks like much of it hasn't been updated for c++11. Is anyone already working on this already? If not, I'd like to make the following changes: - add rvalue-reference overloads to the error_info class ( https://github.com/boostorg/exception/blob/develop/include/boost/exception/d...) and elsewhere so that you can do things like throw my_error() << my_info(std::move(a)) - replace occurrences of "throw()" with a macro (something like BOOST_NO_THROW_SPECIFICATION) that expands to "throw()" if compiling with c++98 and "noexcept" if compiling >= c++11 would these changes be ok? Thanks, Ryan