Javafication

This started as a personal experiment but it has become pretty obvious that a java port may be necessary. (Related: #23)

This pull request is a partial port of the V2 python PlotUtils to Java. The core functionality is implemented but it lacks persistence, customizability and support for WorldGuard. It is worth noting that this port should be way more efficient CPU- and memory-wise.

Do __not__ merge this, it's just a RFC.