Cabot

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* Remove django-smtp-ssl dependency
* Build docker image from alpine
* Refactor docker-compose files
* Fix db_clean task failing on large results tables
* Wait for docker containers to start in docker-entrypoint.sh
* Update CABOT_PLUGINS_ENABLED to compatible plugin versions
* Automatically initialise database, assets and superuser on docker container start

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* Fix all workers running celery beat
* Update django-compressor to run on django 1.8
* Fix typo in url testcase
* Update wsgi.py to work with django 1.8

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* Upgraded to Django 1.8

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* Upgraded to Django 1.7

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* Versioning Introduced.