State win/loss condition at the end of the game splash screen

[aiqc]

For new players, the win/loss conditions are not so obvious.

When the game ends, it would be nice if the win/loss screen printed a message saying which player won and why.

[tomchen]

'You Win!' / 'You Lose!' / 'Tie Game' is already an indication of which player won.

But indeed, it does not state the reason. It would be better if it's stated there.