lots of changes since last week

• added unique location setting to regions.yml, to ensure each randomization lands in a new spot
• added expand option to config, to extend the selection range as chunks are eaten.
• added onEvent permissions for random teleportation on various movement events and/or respawn event.
  • join
  • respawn
  • changeWorld
  • move (this one's hilarious)
  • teleport (recursive, useful for stress testing)
• added unqueued permission to control who can generate a new (not queued) location for a teleportation, thereby limiting default users' control over server performance.
• added an async location queue task after teleportation, to line up a next teleport on a low-priority task, rather than rely solely on a timer.
• cleaned up a lot of the code

Thanks to the plugin's design, the new region options won't impact the number of rerolls, which I'm super proud of.