teams - groups of persons working together

        A team is a group of persons who move and work together, normally
        with the purpose of killing tough monsters or solving quests.

        A team always has a leader. This is the person who invites people
        to join him. When a teamleader moves from one location to an other,
        all team member who are in the first location follow him. While
        moving, the team leader is always front row until the rest of the
        team successfully followed.        

        A team gets higher offensive bonus for each member.         

        team, invite, join, leave, rows, advance, back, solo