Level Up! Reloaded

EXPERIMENTAL CHANGE, YOU WILL NEED TO REGENERATE SKILL AND CLASS JSON FILES

Add customization options to the json files
Most skills now have a "divisor" field, which affects how skill levels are handled. Effects are varied, so it's hard to explain, but you typically don't want the number of skill levels to go over the divisor number.
All classes have overrides for custom names and descriptions.