[WIP] Move to Custom Middleman

[GMatrixGames]

Removes the usage of the CraftBukkit middleman, by writing a new one.

FEEDBACK & CONTRIBUTIONS WELCOME

TODO:

• Create layout
• Create system
• Create remapper from CraftBukkit to Kettle references.
• Test usage
• Test plugin compat
• FINALLY FIX QUARK ISSUES AS WE WONT BE MODIFYING ANY NMS CODE FOR CRAFTBUKKIT!!!!

This list will be updated as things are implemented.
As mentioned above, any contributions are welcome.

If you choose to contribute to this, please prefix your Pull Request title with [CUSTOM], and include in the body message an explanation of what you've implemented.
It will then be reviewed by me, or another developer.

Please target any PRs at the https://github.com/KettleFoundation/Kettle/tree/KettleJavaCustom branch