Add Gueymard stations

- [x] BMSOLx Black Mountain (Canberra) Australia -35.275 149.1136 595 LST+UTC 2012 2014 CSIRO 3 Alberto Troccoli, CSIRO
- [x] Lille France 50.61121 3.14044 63 UTC 2014 2018 LOA
- [x] M'Bour Senegal 14.394 -16.958 21 UTC 2014 2018 LOA
- [x] [Nevada Power Clark Station](https://midcdmz.nrel.gov/apps/sitehome.pl?site=NPC) USA (NV) 36.08581 -115.05189 523 2011 2015 NREL 1 2 NREL no DIF; DNI: NIP; GHI: CMP3
- [ ] Masdar (Abu Dhabi) UAE 24.4418 54.6166 6 2013 2017 Masdar 3 Peter Armstrong, Masdar Institute
- [x] Jaen Spain 37.787767 -3.778132 459 2015 2018 U.Jaen 3 David Pozo, U. Jaen
- [x] Niamey Niger 13.4773 2.1758 223 2005 2006 ARM 3 ARM-DOE
- [x] Seoul Korea 37.46 126.95 300 LST 2012 2015 SKYNET 2 Sang Woo Kim and B. J. Sohn, SKYNET no DIF; http://atmos3.cr.chiba-u.jp/skynet/seoul/seoul.html
- [x] Phimai Thailand 15.184 102.564 212 LST 2015 2019 SKYNET 2 "Hitoshi Irie and Tamio Takamura (CEReS/Chiba-U.), SKYNET" no DIF; data at 10-s resolution; http://atmos3.cr.chiba-u.jp/skynet/phimai/phimai.html

No file, test, or entry point is named in the issue. Locate the station catalog and inspect how the checked Gueymard rows are represented, then add the unchecked Masdar (Abu Dhabi) station using the supplied coordinates, dates, source, and metadata. Done means the Masdar row is included consistently with the other listed stations.

Written by the indexing model from the issue text.