explosion and game over helpers
Merge branch 'master' of https://github.com/Celcius/CoimbraSweeper

Conflicts:
	Sweeper/source/game/Bear.hx
	Sweeper/source/game/Game.hx
	Sweeper/source/game/Player.hx
Merge branch 'master' of https://github.com/Celcius/CoimbraSweeper

Conflicts:
	Sweeper/source/game/Game.hx
Merge branch 'master' of https://github.com/Celcius/CoimbraSweeper

Conflicts:
	Sweeper/source/game/Bear.hx