JarLoader

I added a jar loader and MCMOD.info

The jar loader would be for loading plugins later on, when needed. Just quickly look at the code.

I don't expect you to pull this request, but it's more to show a possibility for how you could do it.

I tried to squash the commits, but only ended up adding 6 more, before giving up 2 hours later. I've tried to do it in 6 ways to squash these commits, but none have worked. If you want to use the class or mcmod.info as is, just copy and paste them from my repo.

I'm really sorry about that it's just there is no way I would ever make the squash work... I've tried to keep it down to 1 commit in the first place, but I always miss something that I don't notice until seeing the diff.