Geodesic refactoring: use Array instead of Bitmap more
Geodesic refactoring: use Array instead of vector even more
Geodesic refactoring: fix inradius computation
Geodesic refactoring: use cpx in the FFT
Geodesic refactoring: get rid of explore() for good
Geodesic refactoring: put more stuff into the QG class
Geodesic refactoring: all done