1.6.2 (2017-07-18)

• No longer require a strict cryptography version but only >=1.8. The previously pinned version is incompatible with Python 3.5.

• Update requirements files to newest versions.

• Update imports to django.urls.reverse so they are compatible with Django 2.0 and 1.8.

• Make sure that manage.py check exit status is not ignored for setup.py code_quality.

• Conform to new sorting restrictions for isort.