Added 1.8 Blocks and recipes in items.ini, crafting.txt and furnace.txt

I haven't add them in BlockID.h because Howaner told me not to do so...
But then i don't undestand why there isn't the names lightgray, ltgray and ltgrey at the hardened clay... it's so messy when so many poeple work on one file and everone has his own names for it... I would suggest to "fix" all the names and use the Mojang-Like names, because they are defenitly the right ones, although they sometimes have multiple names too...