Non-developer specific build

[confuser]

Currently the build process for this is incredibly specific for your setup, this makes it incredibly difficult for others to modify, test and make PRs

[mepeisen]

Due to inactivity of InstanceLabs he gave the project to a new owner. We ported it to maven. See https://github.com/MysticCity/MinigamesAPI

For details on the maven setup we use for nms classes see https://github.com/MysticCity/MinigamesAPI/tree/master/maven-setup