Issue #21: add a Harcore mode. You have 5 lives, if you click on the malusmole or if you miss a mole or a bonusmole.

Signed-off-by: @Rempil <pilliasremi@hotmail.com>
Merge branch 'master' of https://github.com/MatthFleury/WackAMole

Conflicts:
	main.js