Blender Git Loki

Extended GHOST to support WinTab, in order to better support graphic tablets on Windows

Basic support for normal pressure sensitivity is implemented, adding other features like tilt etc. shouldn't be too difficult, now that basic support is there.
Tested with WACOM Volito on Windows XP using the pressure sensitivity with texture paint to change size of the brush .

Added additional include dir to scons, and MSVC 7 project files - other build systems might have to be updated.