[PATCH 0/6] Add a tablet pad interface

[Peter Hutterer]

This patchset adds a new interface, the "tablet pad" interface for the
physical tablet bit of Wacom tablets. The already-merged tablet interface
only covers the tools, not the buttons and rings/strips on the tablet.

Originally this was intended to become the buttonset interface as a generic
interface for devices that are merely sets of buttons and maybe a few axes
(but that don't control the cursor). The way how tablets are handled in
toolkits is quite different though to, say, a 3d mouse. So let's create a
new interface that can be tailored nicely.

The interface itself is quite simple, buttons, rings and strips, the latter
of which are numbered. Left-handed mode is supported for rings, it's still
to be discussed whether we will rearrange buttons when in left-handed mode.

Cheers,
  Peter