Wiimote support

[mardy]

Hi all!
I want to add support for showing the right button names on the Wii ("1", "2" at least), and I'm planning to go the lazy way: since the only supported controller will be the wiimote, I would just replace the button images in the buttons_<size>.png textures with the right images.

What I don't like about this solution is that I wouldn't be able to merge it upstream. So, the question: what's the likelyhood of a PR adding some of the Wiimote buttons being accepted?

[InfoTeddy]

I don't see any problems with adding these buttons. The Wiimote can also be used on PC, after all.

[Fussmatte]

Here are some buttonsets with the Wii Remote and Nunchuk buttons. Hopefully this will help with the implementation.

[mardy]

Here are some buttonsets with the Wii Remote and Nunchuk buttons. Hopefully this will help with the implementation.

Thanks @Fussmatte, you have been extremely helpful! I will remove the buttons Z and C, because they are located on the nunchuck, and IMHO it doesn't make sense to use the nunchuck with VVVVVV (the Wiimote alone is good enough). I should have a PR ready in the next few days :-)