Poly Object should have __eq__ property

[b-butler]

Equality checks based on points would be useful for tests and general comparisons.

[b-butler]

Description

Shapes can be equivalent and we should be able to check that. If #11 is fixed using a simple check on vertices should be enough. We may want to consider vertices which are within a certain dx ~ 1e-6 from each other as equal.

Tasks

• Implement __eq__ methods for Poly classes
• Document functionality
• Add unit test for functionality

[vyasr]

I would like to add equality checks, but I'm not comfortable with any tolerance-based checks. I think only exact equality should match, just like with numpy arrays or similar. We could add a separate method to check approximate equality.

[b-butler]

Hmm in that case we should probably just follow NumPy with an isclose method.