Add a new module "layout" that will eventually evolve into the only
keyboard layout module.
Right now, it uses an external binary (get-kbd-layout) to determine the
layout of a keyboard device (because I did not manage to call libX11
with ctypes correctly).
see #788
see #790
OK - so I have to admit I *hate* the fact that PIP seems to require a
subdirectory named like the library.
But since the PIP package is something really nifty to have (thanks to
@tony again!!!), I updated the codebase to hopefully conform with what
PIP expects. Testruns so far look promising...
