#4 adds support for Wacom TabletPC ISD V4 to xf86Wacom.c

[Dean Townsley]

This patch adds support of the Wacom TabletPC ISD V4
protocol to the generic X windows wacom driver,
xf86Wacom.c. This protocol is used on several
Tablet-based computers including the Acer Travelmate
C100 and the Walkabout HammerHead 3 among others.
Support is provided via new functions
xf86WcmReadISDV4Input() and xf86WcmISDV4Open() and
changes to allow selection of this device in
XF86Config. Set option "ForceDevice" to "ISDV4".

Additionally rotation support is included, selectable
via an option, "Rotate" which can be set to "CCW" or
"CW". This allows use in a rotated mode with proper
video chipset support.

[Dean Townsley]

unified diff against 0.5.0-beta

[John Joganic]

Logged In: YES
user_id=78393

Merged. Thank you for waiting. Now that those functions
are in, you'll be able to make changes without significant
merge problems in the future.