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Playout bug
Merge commit 'bd7b26e91dfe867c17be37f7b5fe06b3a5517d40'

Conflicts:
	source/tesuji/games/go/benchmark/SearchBenchmarkConfig.xml
	source/tesuji/games/go/gui/MCBoardDisplay.java
	source/tesuji/games/go/main/GoEngine.xml