Curver

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* Extra decorators.
* Increased performance via increased memoization.
* Added link to herokuapp.
* Fixed typo in orbit calculations.

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* Extended quotient orbifolds to all finite subgroups.
* Extended the generating sets produced by curver.load().
* Can now identify which mapping classes are Dehn twists together with their twisting curve(s).
* Can now apply a mapping class together with a power.
* Improved EdgeFlip performance.
* Improved simplification performance.
* Simplified use of error classes.
* Fixed bug in scaling Laminations.

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* Now using a quadratic time algorithm to compute invariant multiarcs.
* Fixed bug in computing Mosher sequence.

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* Solves the conjugacy problem for periodic mapping classes.
* Computes quotient orbifold signature of periodic mapping classes.
* Finds invariant polygonalisations of periodic mapping classes.
* Switched to standard version number extraction.
* Switched documentation to use autosummary.
* Separated out Tox testing evnironments.
* Tox checks for print statements in the kernel.
* Mirgrated from NumPy matrices to arrays.

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* Typo hotfix.

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* Fixed API documentation build process and typos.
* Separated out Mappings from Encodings.
* Triangulation.surface now returns a dictionary.
* All moves can now be packaged.
* Standardised unittests.