dinput axis mapping and format mapping patch

[Mike Hearn]

> You should add this in the registry instead of the config file, this
> way we won't have to move it later on. HKLM/Software/Wine/Dinput
> should be a good place for it.

Hmm, we're going to have to move all the registry keys? I thought we 
were just going to convert Software/Wine/Wine into a standard key rather 
than loaded at startup.

If we're going to start scattering the options around in the registry 
this has some implications for winecfg - currently all its settings are 
rooted at HKLM/Software/Wine/Wine