Pinax-notifications

* [Release Notes](https://github.com/pinax/pinax-notifications600)

* Fixed [issue with lock not being respected in `send_all`](https://github.com/pinax/pinax-notifications/issues/69)

* Remove unneeded compatibility with older Django

* Fix bytestring decoding bug
* Update django>=1.11 in requirements
* Update CI config
* Add sorting guidance for 3rd-party app imports
* Improve documentation and markup

* Documentation improvements
* Dropped support for Django below 1.11
* Fixed Packaging

Fix another documentation error