[cosmetic-ish] Please provide compilation instructions // add META-INF to the repo

[DDzwiedziu]

This comes from a total javac-noob, whose attempts at compile are not safe to share, but felt necessary due to the lack of new builds.
Still there is the issue of META-INF lacking. And if something else is lacking I have no idea what that could be.

[Lonami]

Some standardized way to download the required dependencies would be nice, too. Gradle may work well.