added overtime score handler

should allow for infinite overtime sessions if required (lol)

finished mapvote result handler, if multiple maps get the same amount of
votes, it will choose a random result, if option 1 (random) wins, it
will random between 2 > voteMapMenuCount unitl it gets a random map
that's not the current map we're currently on

tweaked cgame_loadmaps slightly

fixed cgame_mapvotehudmsg