Merged useful stuff from extrusion-vertex-arrays branch
Working extrusion array generation based on ifs generation.
Texture coordinate generation for extrusion body.
Introducing simple C++ interface for GLU tesselator.
Merge branch 'extrusion' of github.com:kloper/scooter into extrusion

Conflicts:
	boxfish/src/boxfish_vrml_control.cpp
	boxfish/src/boxfish_vrml_control.h