1.3.3

[tatarize]

• Add in approximate_arcs_as_cubics()
• Add in approximate_arcs_as_quads()
• Permit slice access to Path class
• Permit additional slice access to Subpath class.
• Added test coverage for approximate_arcs code.

[tatarize]

I need a series of checks for the slices. Since I validate the connections between the paths, the slices need to also work that that and they implicitly use indexes rather than slices. So potentially broken connection would need to be rechecked and fixed.