Add obfuscated 1.5.1 inheritance map

py nmsobfinh.py < 1.5.1/nms.inheritmap > 1.5.1/obf.inheritmap
Add inheritance maps

From https://github.com/MinecraftPortCentral/MCPC-Plus/blob/master/resources/mappings/v1_5_R2/nms.inheritmap
Generated by SpecialSource --write-inheritance