Scrapy-redis

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* Fixes bad formatting in logging message.

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* Fixes wrong message on dupefilter duplicates.

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* Fixed typo in default settings.

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* Fixed data decoding in Python 3.x.
* Added ``REDIS_ENCODING`` setting (default ``utf-8``).
* Default to ``CONCURRENT_REQUESTS`` value for ``REDIS_START_URLS_BATCH_SIZE``.
* Renamed queue classes to a proper naming conventiong (backwards compatible).

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* Added ``REDIS_START_URLS_KEY`` setting.
* Fixed spider method ``from_crawler`` signature.

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* Support ``redis_cls`` parameter in ``REDIS_PARAMS`` setting.
* Python 3.x compatibility fixed.
* Added ``SCHEDULER_SERIALIZER`` setting.