Built from Rev 3173

Changes:

* implement passwords

* fix occasional crash closing game when a draw in progress

* custom editor for color preferences (Please let me know what you
  think of this.  Is it good enough?  Do people need the ability to
  enter specific numerical values?)

* remove fields for host and port from config dialog for connection
  via relay.  You have to set these in an advanced preference now --
  because most users should never have to.

* Fix to recognize connection as dead when relay goes down and to try
  periodically to reconnect.  Other fixes so that you don't have to
  close and reopen a game to get it to restart network connection.