Add serialVersionUID.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Fix NbtTagBooleanArray IO.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Fix JavaDoc errors.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Do some refactors.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Merge branch 'pre-release-1.2' into develop