(bugfix) Game.Clone() fails to deep copy moves #64
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Currently if a game is cloned and the child is subsequently mutated,
e.g.
child := parent.Clone()
child.PushMove("Nf6", nil)
the parent is incorrectly mutated. This commit fixes the issue by deep
copying the moves in Game.Clone(). Additionally we augment the tests
to catch this situation.
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Currently if a game is cloned and the child is subsequently mutated, e.g.
child := parent.Clone()
child.PushMove("Nf6", nil)
the parent is incorrectly mutated. This commit fixes the issue by deep copying the moves in Game.Clone(). Additionally we augment the tests to catch this situation.