Playbook patches

As I've been paring down and specifying unnecessary rules, I've also had to make some fairly substantial changes to the playbooks and how they work. That means that more-major-than-expected changes have been made to the game more recently than expected. I've also adjusted the character sheets and uploaded slightly cleaner-looking versions of them as images.  Balance and readability issues remain but hopefully I'll be able to correct for those as I continue to test and re-read the system.