Include inactive players (if they have any points) when sending to clients

Include inactive players (if they have any points) when sending to clients

This allows clients to display scores for all players in a game, (even if
some players happen to not be active anymore).

To make the state consistent, we also send the active bit in the JSON
info for any player.

This commit fixes up the Tic-tac-toe tests in the test suite to now
expect this active property in the info sent from the server.