Staff Mod 0.13.0-beta

[opekope2]

• Fix staff model's missing model loader - only used, if a staff contains an item, which has no item handler registered. Only possible if the item's NBT is edited or by using other mods (latter is unlikely)
• Change furnaces, magma block, and snow block staff to check for clearance - this is to prevent shooting through walls
• Add campfire and soul campfire staffs