[tz] Rangoon to Yangon

Myanmar's former capital and most populous city is currently known as Yangon. In 1989 Burma was renamed Myanmar (which you have reflected in the Asia data file). At the same time, Rangoon was renamed Yangon, which is currently not reflected in the codebase. http://www.forbestravelguide.com/yangon-myanmar/whats-the-difference-between... . -- David Massoud http://lnked.in/DavidMassoud