Curver

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* Laminations can now be specified via a dictionary of weights.
* Custom print method for topological types to match paper.
* Fixed closed case topological type bug where parallel curves separated by a puncture would appear different.
* Added minimum dependency versions.

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* Officially removed Python 2 support.
* Disjoint sum supports a dictionay specifying multiplicities.
* Stripping leading and trailing identity isometries for performance.
* Rewritten to assume that laminations are the correct subclass.
* Switched to left_weight and right_weight.
* Removed Coveralls support.
* More figures for documention.
* Using six.
* MCG now use SLP to parse creation strings.
* Fixed bug where twists could occur even when drop=0.

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* Added Pachner 1 --> 3 move.
* Added MultiEdgeFlip Move.
* Crushing now respects the underlying triangulation.
* Using custom Half class.
* Now using create methods to build and link moves and their inverses simultaneously.
* Using IntegralLamination intermediate class.
* Testing curver.load.
* Dynamically building triangulations during testing.
* Memoize works even for methods that raise Exceptions.
* Standardised error message style.
* Fixed appveyor build process.
* Fixed py.test usage.

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* Better documentation including installation instructions.
* Travis now using stages.
* Docstring bugfix.

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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.