Update v0.3

I finally figured out what I wanted safety mechanics to look like in Chess: Two Kingdoms. I've reflavored Lines and Veils and given them mechanical weight in the game, and included optional ban and add lists for a more focused experience and point of reference. I also tried to make the PDF easier to read according to helpful tips that Cass K wrote, that you can find here: https://www.casskdesigns.com/design-posts/accessibility-layout