CraftTweaker Support (1.12.2)

Thanks https://github.com/Zixxl for getting CraftTweaker integrated to the 1.12.2 release!

CraftTweaker methods for customising PNC:R in 1.12.2 are documented on the official CraftTweaker website: http://crafttweaker.readthedocs.io/

Note the 1.12.2 PNC:R release is no longer getting updates for bugs or feature requests.