Mining Levels

New pickaxe mining levels (dependant on the head material)
0 Wood/Stone/Netherrack/Paper/Slime/Cactus
1 Flint/Bone
2 Copper
3 Iron/Thaumium
4 Bronze/Steel
5 Obsidian/Alumite
6 Ardite
7 Cobalt
8 Manyullyn
* The required material to progress to a tier always requires material only harvestable by the previous tier's tools.

Required harvest levels changed
0 Stone
1 Coal/Copper/Aluminum/Tetrahedrite/Bauxite/Zinc
2 Iron/Cassiterite/Pyrite/Silver
3 Tin/Gold/Lapis/Steel/Galena/Nickel/Invar/Electrum/Sphalerite
4 Obsidian/Diamond/Emerald/Redstone/Gems/Cinnabar/Quartz/Tungstate/Sodalite
5 Ardite/Uranium/Olivine/Sheldonite/Osmium/Platinum
6 Cobalt/Iridium/Cooperite/Titanium
7 Manyullyn
* Some of the listed materials are only available when added by other mods