Update dependencies
Removed abstractions - we're only supporting Bukkit API
Removing custom-kill from sample jobConfig.yml

This feature has not worked for long time, and probably won't be back in
it's current form.
Switch players to Mojang UUIDs
Add async support to economy
Convert old mysql-url to new mysql-hostname and mysql-database
2.12.0 Release
2.12.1-SNAPSHOT