Adding Airports

[Sora]

I've moved over to South Korea and found some mistakes (while also adding seven more airports):

- Gimhae International Airport's (PUS) longest runway measures 10,499 ft (NOT 3,201 ft) with 14,900,815 passengers.
- Incheon International Airport (ICN) had 57,765,397 passengers in 2016.
- Gimpo International Airport (GMP) had 25,043,088 passengers last year.
- Cheongju International Airport (CJJ) is actually located in Cheongju (NOT Daejeon, which is only served by the airport).
- Daegu International Airport (TAE) should have had 1,084,585 passengers.
- Yangyang International Airport (YNY) is located in Yangyang (NOT the city of Sokcho).
- Gwangju Airport (KWJ) has a latitude of 35.126389 and a longitude of 126.808889.
- Muan International Airport (MWX) is located in South Korea (NOT Afghanistan) with the local time being UTC+9.

That's all, folks.