Let NbtTagFactory create factory instance when class loading.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Make TagInputStream and TagOutputStream thread safety.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Fix null point access.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Format code.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Merge branch 'pre-release-1.1' into develop