random teams on firsthalf

going to add a team vote option at some point, but for not we'll just
keep it random

random teams from 5 players to iPlayers / 2, should get half of the
players in the server (minus hltv), useful if somebody wants to have a
pug of more than 5 players on each team.

mapvote handler from < 10 to <= g_voteMapMenuCount to handle if people
want more than 9 maps to vote for (need to do this in the loadmaps
function as well at some point)