NWorldPermissions 4.0.2

It's a previous version so the codes are not accurately this versions', but very similar.

自动检查更新；
完善 plugin.yml ；
将原来的出现 Exception 时的 warning 改为 printStackTrace ；
在 messages.yml 损坏时，将不再给玩家提示，转而记录一个 severe ；
可以通过设置 messages.yml 中的某项为空串，指定其不提示消息（原来会有一个空行）；
发现了一个 bug ，并修复了。

The translation results of English may not be exactly the same as the original and might have syntax errors:
Automatically check the update;
When exception occurs, 'Exception.printstacktrace()' will be invoked, instead of sending a warning log;
When 'messages.yml' is damaged, the player will no longer receive a message;
If you set an item in 'messages.yml' to an empty string, it won't send anything.