Add Puerto Rico sites

[stucka]

Puerto Rico needs a stub in bundles, and is the biggest non-state territory, and may have little or no representation in the sites file. I'll try to get this to my to-do list.

Sites recommended by a colleague there:

https://twitter.com/cpipr https://twitter.com/ElNuevoDia https://twitter.com/Metro_PR https://twitter.com/VoceroPR https://twitter.com/Sincomillas https://twitter.com/newsismybusines (cq) https://twitter.com/noticel https://twitter.com/wapatv https://twitter.com/TelemundoPR https://twitter.com/esmental_mag

[stucka]

Note Puerto Rico has its own ISO country code. Surprise!