Rework TW matchmaking.

Set Brackets for guilds, every guild can only be match up with guild within a 50-100M gp of them. Each bracket has a set # of teams per zone. 
Then filter again, and match up guilds to be as close as possible in terms of active GP. If no guild is found within the active range, filter upwards, not downwards. 

Step 1: fixes Sandbagging. 

Step 2: Ensures an equal matchup, and punishes attempts to sandbag. 

The filter upwards, punishes the guild with less sign ups. Yes, this may suck if you don't play TW or miss singup, but your guild gets punished if you miss other events anyway. I'd rather it be consistent and harsh, then lenient and riggable.