CoFH Core - world gen

[thor12022]

• [ ] Shrink vein sizes for Coal, Copper, Tin, & Iron, increase number of veins, but the total ore count should be reduced somewhat.
• [x] Add sand veins ( Issue #39 ) to Ocean, Sandy, Plains, Beach, Mesa, Wasteland, and Coniferous.
• [ ] Remove Magnesium, Potash,& Posphorite Ore generation (should disable in Metallurgy config too).
• [ ] Adjust Saltpeter to mimic Railcraft's saltpeter generation.
• [ ] If Lead is used by anything other than Factorization it should generate in (small) quantities along side Silver.
• [ ] Remove sulfur veins & sub-lava deposits.
• [ ] Add Metallurgy Magical Ores to the Spirit World.
• [ ] Remove (most? keep Diamond, Emerald Sulfur, Saltpeter, Redstone? & Lapis?) Overworld-Centric Nether Ores from world gen

[thor12022]

Lead is used by Railcraft for Electric Shunting Tracks & RotoraryCraft for the Magnetostatic Engine

[thor12022]

Sand veins added at 77f4aef6464c74558273e93173d867fd8076f05c

[thor12022]

Quantity of Ore veins seems reasonable, they were shrunk somewhat

[thor12022]

Using Railcraft's saltpeter gen instead 6da8fbb4e0c88658c4f16468830ea4c97f97e324