Added custom language support. Be sure to rename default.yml, or it will be overwritten. Set it with ` locale` in the config.
Also added the option to use a square world border. This is now ` enabled` by default, and to disable it, turn on ` smooth-distance`. This should provide some performance gains.

• Fixed spawning quadruplets almost every time when the relative level was low enough
  
• Changed alias to /buff from //buff