fix create_pt_fcts and add orientation to LineAxis3D
fix compute_extension_point routine

    use s.a and not s.b in final calculation
    l_t_i[1] was wrong, fix it
    add a_t analogous as u_t
    substract Ax at Dx in final calculation (due to base change)
add 2D generation testing

    dispatch 2D and 3D generation testing in two functions
change window initial size to 800x800

    because 500x500 was too small for viewing tests
Merge branch 'master' of github.com:perelo/Cubical3DPath

Conflicts:
	src/path.py
Merge branch 'modeling'