Boost.Chrono: Version 0.2.5, Bug fixes
- complete qualification boost::chrono::duration to avoid possible BUG in gcc-4.4.0 reporting the following error
./boost/chrono/chrono.hpp:945: error: declaration of 'typedef class boost::chrono::duration<long long int, boost::ratio<1ll, 10000000ll> > boost::chrono::system_clock::duration'
./boost/chrono/chrono.hpp:458: error: changes meaning of 'duration' from 'class boost::chrono::duration<long long int, boost::ratio<1ll, 10000000ll> >'