Polish the UI:
authorJérôme Benoit <jerome.benoit@piment-noir.org>
Thu, 4 May 2017 23:12:12 +0000 (01:12 +0200)
committerJérôme Benoit <jerome.benoit@piment-noir.org>
Thu, 4 May 2017 23:12:12 +0000 (01:12 +0200)
* clear the screen when neeed;
* be more informational about wrong shot;
* permit to restart the game once finished.

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

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