* Make the FULLSCREEN function bindable on platforms that support it.
* Linux has F as default binding.
* Windows support is not implemented, but is there ; applications will
just not suggest it under windows for the moment.
* Some cosmetic cleanup.
* Have the unix version report analog control the same way the
windows version does.
* Move back Run() into JGE::Run(). The code for ::Run() is still
inside main.cpp.
- This fixes the "blinking screen problem", issue 341. I think.
- I have no idea WHY it does, but it's better than not fixing it.
- Run() would be better in ::Run() in main.cpp than in JGE, should
be moved back when we know more about the problem.