configure.ac: Add libtool versioning setting to configure.ac

Add the explanatory description of the version components from libevdev
as well.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
configure.ac: libinput 0.2

Bump the libinput version and the libtool version.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
touchpad: Make pointer movements a bit faster by default

Alter the so far hard coded parameters a bit to make the pointer
acceleration profile accelerate the pointer movement a bit more than
before.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>