Waystone removal

Waystones removed in unexpected ways (ex. WorldEdit, /setblock, etc.) will now update accordingly.

• While I don't see a way to make this happen, there are also extra protections if a player somehow teleports to a waystone that doesn't exist in the world under the configuration key remove_invalid_waystones, which is true by default
• There is also the command /sswaystones remove [hash of waystone] to remove them from the comfort of your chatbox! (you can find hashes by running /sswaystones list and using the letters in the first pair of square brackets. ex. [HASH123])