This change adds methods to Surface and TriMesh for intersecting with an axis aligned planar surface:
- Surface.axial_edge_crossings()
- TriMesh.axial_edge_crossings()
The release also includes:
- Functions in olio.triangulation for identifying 'rim' edges in triangulated sets
- Low level setting of xml Title text to 'untitled' when it would otherwise be blank, for improved compatibility with fesapi