Added Spinel pickaxe

Having added a Spinel ToolMaterial, now an uncraftable Spinel pickaxe
can be used with a speed equal to that of gold and unparalleled
durability.
Added SiNi pickaxe

Using the same framework as the Spinel pickaxe, a SiNi pickaxe has been
added. This is much faster, enchantable and has a far greater
durability. Still, both are uncraftable.
Changed line endings

Changed line endings