Update and rename src/main/java/CustomOreGen/Util to src/main/java/CustomOreGen/Util/GammaFunction.java
Update and rename src/main/java/CustomOreGen/Util to src/main/java/CustomOreGen/Util/GammaFunction.java

Math functions for Gamma
lawremi/CustomOreGen,lawremi/CustomOreGen,reteo/CustomOreGen,reteo/CustomOreGen