Also contains a bit of refactoring on internal logic. Modifies (secondary) siege mechanics.
* Un-couple siege from core claim functions
* UUID overload, documentation, naming clarity
* Add internal special message override support
* Fix permission calculation issues in subclaims
* Migrate egg handling to new methods
* Use suppliers for denial message
In many use cases addons don't care why a denial occurred, only that it did. On-demand calculation is vastly preferable to reduce server impact.
