Python-crfsuite

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* :meth:`pycrfsuite.Tagger.info()` is fixed.

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* (backwards-incompatible) training parameters are now passed
using ``params`` argument of :class:`pycrfsuite.Trainer` constructor
instead of ``**kwargs``;
* (backwards-incompatible) logging support is dropped;
* `verbose` argument for :class:`pycrfsuite.Trainer` constructor;
* :meth:`pycrfsuite.Trainer.get_params` and
:meth:`pycrfsuite.Trainer.set_params` for getting/setting multiple training
parameters at once;
* string handling in Python 3.x is fixed by rebuilding the wrapper with
Cython 0.21dev;
* algorithm names are normalized to support names used
by crfsuite console utility and documented in crfsuite manual;
* type conversion for training parameters is fixed: ``feature.minfreq``
now works, and boolean arguments become boolean.

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* added ``sklearn_crfsuite.metrics.flat_recall_score``.

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* Properly close file descriptor in ``FileResource.cleanup``;
* declare Python 3.6 support, stop testing on Python 3.3.

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* Small formatting fixes.

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* scikit-learn dependency is now optional for sklearn_crfsuite;
it is required only when you use metrics and scorers;
* added ``metrics.flat_precision_score``.