For the last few days tons of Zelda fans have been getting their first taste of Tri Force Heroes thanks to Nintendo’s demo codes. This little anticipatory gift has now spread to Europe with an extra cherry on top; a 10% launch discount for the full game come next week. For all you European fans, take advantage of downloading the demo, even if you’re holding out for the real deal. Once Tri Force Heroes hits the Nintendo eShop, you’ll be…