Scrapy-splash

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* fixed issue with response type detection.

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* Scrapy 1.0.x support is back;
* README updates.

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* ``SPLASH_COOKIES_DEBUG`` setting allows to log cookies
sent and received to/from Splash in ``cookies`` request/response fields.
It is similar to Scrapy's builtin ``COOKIES_DEBUG``, but works for
Splash requests;
* README cleanup.

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* Warning about HTTP methods is no longer logged for non-Splash requests.

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* ``SplashAwareDupeFilter`` and ``splash_request_fingerprint`` are improved:
they now canonicalize URLs and take URL fragments in account;
* ``cache_args`` value fingerprints are now calculated faster.

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* ``cache_args`` SplashRequest argument and
``request.meta['splash']['cache_args']`` key allow to save network traffic
and disk storage by not storing duplicate Splash arguments in disk request
queues and not sending them to Splash multiple times. This feature requires
Splash 2.1+.

To upgrade from v0.4 enable ``SplashDeduplicateArgsMiddleware`` in settings.py::

SPIDER_MIDDLEWARES = {
'scrapy_splash.SplashDeduplicateArgsMiddleware': 100,
}