LWJGL controller support

[Matzon]

LWJGL has controller support, thanks to the work of Kevin Glass.
It was chosen to use the jinput library, since this would be easiest. We have ofcourse provided LWJGL wrappers so that it is much simpler to use.

Kevin is also working on icon support, and if all things goes well he should be able to commit it this weekend. Once this is done we will take confirm the recent commits, and plan next release.