Kaneda

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* Add support for Django 2.0.
* Fix issues with InfluxDB backend.
* Fix issues with RethinkDB backend

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* Add InfluxDB reporting backend.
* Add RethinkDB reporting backend
* Add ZMQ queue class and task for asynchronous reporting.

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Add support to run Kaneda in asynchronous mode.
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* Add Celery and RQ queue classes and tasks with backend reporting.
* Add the option to configure Kaneda with a settings file.
* Add utils.py file to handle the settings.
* Add asynchronous reporting, settings file and queue classes documentation.
* Add integration and benchmark testing. Improve unit tests.

Add Django support.
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* Move from django-kaneda project.
* Add integration tests.
* Improve Django documentation

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* ElasticBackend now can be configured passing a list of 'hosts' or a list of 'connection_urls'.

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* Add LoggerBackend.
* Add exeception treatment on backend report methods.
* Add connection timeout for storage backends.
* Storage backends now support passing client or connection url as parameters instead all parameters.
* Add support to use django-kaneda on debug mode.

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* Refactor backend payload build method to unpack value field when is a dict.