Allow mamer addtotourney to do late-joins

Allow mamer addtotourney to do late-joins

The score parameter of AddPlayer is now used to  indicate it was invoked
by addtotourney rather than join (info passed in pendingList through the
Player.floatValue field), as in the existing code it was only called with
score = 0. anyway. When invoked from addtotourney, the command is also
allowed in 'closed' tourneys. In this case it would not only add the player,
but also clear its color counts and give it a 0 result against the BYE.