Pattern-clustering

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* Checked experiments in `notebooks/`
* Fixed warning related to documentation build
* Improved tests

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* Bug fixes in `notebooks/`
* Removed unused patterns

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* Added `pattern-distance` entry point, see `pattern-distance --help`.
* Added `pattern-clustering-mkconf` entry point. The resulting json may be passed to `pattern-distance` and `pattern-clustering` commands.

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* Fixed readthedoc build
* Implemented console script (cli)
* Reworked `PatternClusteringEnv` class
* Bug fixes
* Updated documentation

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* Fixed readthedoc build

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* Fixed sphinx local build
* Fixed bumpversion
* Add experiments notebooks and datasets
* Improved test suite

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