Use Lita 3 style entry point and clean up configuration.
Use helper methods for conciseness.
Move messaging into locale file.
Extract config and data upgrades into separate handlers.
Make Lita::Handlers::Karma a module.
Move help text into locale file.
Fix minor issues with decay.
Move domain logic into Term class.
Move check logic into Term.
Move incr/decr and cooldown logic into Term.
Move list logic into Term.
Use a shorter name for the decay support key.
Move decay logic into Term and refactor Action.
Use less fragile examples for verifying upgrade methods are only called once.
Reorganize README and list the correct version for 3.1 additions.