Files needed:

In startup.txt, for fuze keyboards, add physkeyboard=fuze to the cmdline.
For standard raph, no change is needed.

TODO: I'm welcome to suggestions as to where I could put useful alt keys, perhaps
for console use (like the pipe |, or > for output redirection).

The fuze also has a push-to-talk button which does not generate any input events
from what I saw. This might need a modification to gpio_keys in the kernel. phh
would know.

I'm sure there will be some bugs, but at least they'll be easy to fix now :D
