More configurable fall effect + some fixes + less lag
- Fall effect is disabled in unloaded chunks to prevent lags
- Fall effect can be disabled separately for each chest (/lc togglefall <chest>)
- Fall effect height is editable, but for all chests
- Some permissions fixes (some commands where protected with the wrong perm)
- Fixed holograms not showing at all without fall effect (WHY NO ONE REPORTED THAT O_O)