Forced Team Balancing - Killarny (killarny@espnow.com)

This plugin allows forced team balancing by denying team join/switch to teams
that would become uneven. In addition to this, the plugin also notifies the players
in the server when teams are uneven (due to people disconnecting, etc).
This plugin currently only works in mods that have two teams, since I don't know
how to get the number of teams in adminmod.

New Commands:
      admin_balance <on|off>: Sets the forced team balancing.

TODO:
      - find out how to get number of teams, and allow the mod to support any
      number of teams
      - find out how to get team names, and use those in the message, instead
      of "Team #"
      - add an option for forced automatic team switching when teams are
      unbalanced