Fixed bug where Naoko would not respond to anyone using Modflair.

As mentioned here https://github.com/Suwako/cyNaoko/pull/19#issuecomment-29012378 cyNaoko will not respond to a user with modflair enabled. Meta will be True if modflair is on (cytube sends "meta":{"modflair":RANK}), checking for addClass prevents this issue and still ignores anything but regular chat messages.