Convert a BGStats export to Markdown

Quick story: I used to use a straight Markdown file to store all my board game plays, and I took the time (a very very long time) to convert all of them over to BGStats (iOS)(Android). I still wanted to keep around a markdown table sometimes just to archive as a text document or share or something, so I made this.

To get a markdown table.

1. Add BGStatsExport.json to the root.
2. Run node bgstats-to-markdown.js
3. Save output.md somewhere.