xf86-input-libinput: Changes to 'master'

[Peter Hutterer]

 include/libinput-properties.h |    3 
 man/libinput.man              |   30 ++++++
 src/xf86libinput.c            |  194 ++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 221 insertions(+), 6 deletions(-)

New commits:
commit 974ab6b62bd2af97e1556314df28fe9f3b816e54
Author: Peter Hutterer <peter.hutterer at who-t.net>
Date:   Fri Oct 28 11:20:22 2016 +1000

    Add tablet tool area ratio property
    
    By default, the X server maps the tablet axes to the available screen area.
    When a tablet is mapped to the screen but has a different aspect ratio than
    the screen, input data is skewed. Expose an area ratio property to map the
    a subsection of the available tablet area into the desired ratio.
    
    Differences to the wacom driver: there the x/y min/max values must be
    specified manually and in device coordinates. For this driver we merely
    provide the area ratio (e.g. 4:3) and let the driver work out the rest.
    
    Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
    Reviewed-by: Jason Gerecke <jason.gerecke at wacom.com>