Update airport New Islamabad International Airport (ISB/OPIS)

[jpatokal]

New airport edit suggestion submitted by bmomjian:

Array
(
[apid] => 13760
[name] => New Islamabad International Airport
[city] => Islamabad
[country] => Pakistan
[iata] => ISB
[icao] => OPIS
[x] => 72.851613
[y] => 33.560713
[elevation] => 1646
[timezone] => 5
[dst] => N
)
;

Existing, potentially conflicting airport information:

Array
(
    [name] => New Islamabad International Airport
    [city] => Islamabad
    [country] => Pakistan
    [country_code] => 
    [iata] => ISB
    [icao] => OPIS
    [x] => 72.851613
    [y] => 33.560713
    [elevation] => 1646
    [apid] => 13760
    [uid] => 30123
    [timezone] => 5
    [dst] => U
    [tz_id] => 
    [type] => airport
    [source] => OurAirports
)

Cross-check this edit on other sites with compatible licensing:

• OurAirports: http://ourairports.com/airports/OPIS/pilot-info.html
• Wikipedia: http://www.google.com/search?q=wikipedia%20OPIS%20airport&btnI

[bmomjian]

I created a pull request #1127