Addon currently lists wargames together with ranked games

[johannesklev]

In addition to the way ArenaStatsTBC currently records skirmishes, the addon should equally filter out wargames. Splitting the data into "rated" and "unrated" should correctly filter out both skirmishes and wargames.

To reproduce:

1. Make two groups with two level 70 players in each group, where the leader of the other group is on your Battle.net friends list.
2. Type "/wg Battle#1234 nagrand" into the chat, where "Battle#1234" is replaced with your friend's Battle.net ID.
3. Win or lose, but stay in the match until a winner is announced.
4. Check "/arenastats toggle" to see how (or if) the game was recorded.

Expected behaviour:
After step 4, the wargame should not be listed together with the ranked matches.