NetherOres partial support

Partial due to new blocks added since 1.4.

New textures required:

in textures/blocks/powercrystals/netherores/
tile.netherores.hellfish.png   (looks like base netherrack)
tile.netherores.ore.1_0.png   (nether platinum ore)
tile.netherores.ore.1_1.png   (nether ferrous ore)
tile.netherores.ore.1_2.png   (nether pig iron ore)
tile.netherores.ore.1_3.png   (nether iridium ore)
tile.netherores.ore.1_4.png   (nether osmium ore)

in textures/mob/powercrystals/netherores/
hellfish.png