Extract BGG game id and add to csv

[trevorld]

• From BoardGameGeek ID use a tool like python's boardgamegeek command and get info like minimum age, ratings, number of "owners" etc.

[trevorld]

• http://sdsawtelle.github.io/blog/output/boardgamegeek-data-scraping.html
• https://boardgamegeek.com/wiki/page/BGG_XML_API2
• https://www.boardgamegeek.com/xmlapi2/family?id=136
• https://www.boardgamegeek.com/xmlapi2/thing?id=2860
• https://www.analyticsvidhya.com/blog/2017/03/beginners-guide-on-web-scraping-in-r-using-rvest-with-hands-on-knowledge/
• https://blog.rstudio.com/2014/11/24/rvest-easy-web-scraping-with-r/