[vtkusers] Python compass widget example

[Anders Wallin]

> I'd recommend compiling from source. There's nothing more frustrating
> then seeing that something you want has been added/fixed but you can't
> get your hands on it.

trying to compile then. I get stuck with "ccmake ." which says:
 CMake Error: The following variables are used in this project, but they are
 set to NOTFOUND.
 Please set them or make sure they are set and tested correctly in the CMake
 files:
 OPENGL_INCLUDE_DIR (ADVANCED)
(followed by a lot of paths), and then further down:
 PYTHON_INCLUDE_PATH (ADVANCED)
(again followed by a lot of paths)


AW