[RefData][ORI] Fixed issue #9.

As part of that fix, the city code of a POR is now picked from the
file of best known coordinates. The following POR entries have been
corrected: AOQ/Aappilattoq Upernavik, BWH/Butterworth, BWU/Bankstown,
DFW/Dallas, FTW/Fort Worth Meacham, HBT/Hambantota SPB, HRI/Hambantota,
HVZ/Hévíz Ma Bus Station, JCJ/Chuja, JSP/Seogwipo, NZC/Nazca,
PDP/Punta Del Este, PEN/Penang, PVB/Punta Del Este Bus Station,
QUV/Aappilattoq Kujalleq, SOB/Balaton, UPK/Upernavik Kujalleq,
UWE/Wiesbaden Central Station, WIE/Wiesbaden, YIC/Yichun,
ZCC/Baden-Baden Railway Station.