Search for Periodic Points

[saraedum]

TODO

• [ ] Add an entry in doc/news/.
• [ ] Add a test for this change.
• [ ] Add new .py files to the documentation in doc/geometry or doc/graphical.

Expose through ThurstonVeech or cylinder decomposition

• [ ] Expose horizontal_twist() and vertical_twist().
• [ ] Implement regions().
• [ ] Implement veech_group() and random_element() there.

Implement Region:

• [ ] Implement width() and height().
• [ ] Implement intersection() to intersect a region and a line to obtain a segment.
• [ ] Implement horizontal_cylinder() and vertical_cylinder().

Implement Cylinder:

• [ ] Implement circumference().
• [ ] Implement multiplicity().

[saraedum]

To resolve merge conflicts, please run git fetch git@github.com:saraedum/periodic periodic then git merge FETCH_HEAD then git push.