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* Fixed an issue with map not always setting correct zoom level
* Removed admin url data attribute from the map marker if cms isn't in edit mode
* Added support for Django 1.11, 2.0 and 2.1
* Removed support for Django 1.8, 1.9, 1.10
* Adapted testing infrastructure (tox/travis) to incorporate
django CMS 3.5 and 4.0