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...
The reason for multiple names is that both admins and players can use these names, so we want to make it as easy as possible for them. Some of the alternative spellings are missing because people who update this file sometimes forget that there could be an alternate spelling.