Update iata-icao.csv

Fix #26 .

Merge pull request #25 from Gorcenski/master

Add airport: Milan-Linate

Update iata-icao.csv

Fix #23

Update iata-icao.csv

Fix #22

Fixed issue #21

Merge pull request #20 from immccn123/patch-1

Fix missing ICAO codes of ZYBA / ZSSM

Merge pull request #19 from onepiece0122/master

Fix latitude of RNG

Merge pull request #17 from bangnokia/master

remove duplicated IATA codes

Fixed issue #14 .

Update iata-icao.csv

Updated the wrong coordinate for Sphinx International Airport.