Begin a cython wrapper.
Ignore cython-generated cpp file.
Use _ycad instead of pythonocc.

(Lots of important stuff commented out for now.)
Add support for bool ops in cython wrapper, and simplify code a bit.
Add libraries to setup.py, and make the list a bit more concise.
Wrap some geom math in cython.
Support transforms.
Support cylinders and cones.
Make Combination actually work.
Support spheres.
Support read() for STLs.
Wrap gp_Ax2.
Wrap gp_Circ, TopoDS_Edge/Wire/Face, and BRepBuilderAPI_MakeEdge/
Wire/Face
Move cython shape constructors after definition of Shape class.
Support circles. (Also, add an empty gp_Circ constructor.)
Wrap Add methods for MakeWire and MakeFace.
Support toruses.
Wrap TopoDS_Shape downcast functions for Edge/Wire/Face.
Wrap edge/wire/face downcast methods in Shape class.
Support polygons. (Various cython fixes btw.)