WIP: Add traits from Path of War: Expanded

[drumanagh]

This adds entries for the four traits in Path of War: Expanded. So far just two of the four, Agile Dancer and Practiced Initiator, are currently implemented (the other two have notes making it clear that right now they're just placeholders).

For Combat Training, I'm not sure how to implement this one, since it's missing a fundamental piece - the text doesn't actually say what the IL of the maneuver it gives is. Would making it basically copy Martial Training's mechanics be a reasonable move? It's extra-weird, though, because it's only separate like that as long as you have no initiating classes, but if you have one it attaches itself to the first one.

For Unorthodox Method, I don't think it would be too difficult to implement, but I'm not sure how to cleanly represent it in the UI, since it needs three choosers (class, discipline to remove, discipline to add), or a Qinggong Monk-style configurable with specials that exist just as choosers.

• Agile Dancer
• Combat Training
• Practiced Initiator
• Unorthodox Method