Update cities.json
Update cities.json

The following cities have been added to the metroextractor system
+ Jeju, South-Korea
+ Phuket, Thailand
+ Chiang-Mai, Thailand
+ Osaka, Japan
+ Hanoi, Vietnam
+ Kyoto, Japan
+ Koh Samui, Thailand

mapzen/data-pages,mapzen/data-pages,mapzen/data-pages