Pinax-calendars

* [Release Notes](https://github.com/pinax/pinax-calendars300)

* Add pinax-templates support
* Remove local template

* fix `reverse` import for Django 2.0

* Update requirements, add django>=1.11
* Update sorting config
* Update documentation
* Remove doc build

* fix setup.py LONG_DESCRIPTION for PyPi

* Add Django 2.0 compatibility testing
* Drop Django 1.8, 1.9, 1.10 and Python 3.3 support
* Convert CI and coverage to CircleCi and CodeCov
* Add PyPi-compatible long description
* Move documentation to README.md