Duels are won on games, not crowns

A river race duel is best of three games, and the player who wins two wins the duel. Elixir was deciding the result from the crowns summed across all three games, so a duel won 0-3, 1-0, 1-0 was recorded as a loss at 2 crowns to 3. The Elixir Gym found 7 of one player's 70 duels recorded wrong this way. Duels are now decided on games, and every duel already in the record was recomputed from its games, with the daily totals behind them. The same pass fixed a duel's leaked elixir, which is now the sum of its games. It also fixed three comparisons: tower hitpoints when the towers started at different levels, starting trophies on war battles (war matchmaking does not pair on them), and a player who climbs through several trophy floors in one window, who now gets a floor-by-floor account instead of one number. Contract 6.21.0.