Fuzzysearch

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* Added PyPy support.
* Several minor bug fixes.

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* Dropped support for Python 3.4.
* Removed deprecation warning with Python 3.8.
* Fixed a couple of nasty bugs.

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* Added ``matched`` attribue to ``Match`` objects containing the matched part
of the sequence.
* Added support for CPython 3.8. Now supporting CPython 2.7 and 3.4-3.8.

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* Fix calling ``search_exact()`` without passing ``end_index``.
* Fix edge case: max. dist >= sub-sequence length.

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* Fixed some C compiler warnings for the C and Cython modules

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* Dropped support for Python versions 2.6, 3.2 and 3.3
* Added support and testing for Python 3.7
* Optimized the n-grams Levenshtein search for long sub-sequences
* Further optimized the n-grams Levenshtein search
* Cython versions of the optimized parts of the n-grams Levenshtein search