Added custom nopower heroes (and changed the default to be more user friendly)
Added support for a disabledWorlds field
Added significantly more comments to the config.yml - you will need to regenerate your config.yml to see these new fields there. Otherwise, you can navigate to the config.yml on the github and find the new default and change your file as appropriate.
For maximum compatibility with prior versions, change the name field under defaultHero to "nopower". It should be fine for most people though.