it seems does not support django2.0

[ckwillling]

when run app, I got

File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 936, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
  File "/Users/tony/env/kunlun/lib/python3.6/site-packages/cas/views.py", line 19, in <module>
    from django.core.urlresolvers import reverse
ModuleNotFoundError: No module named 'django.core.urlresolvers'

django.core.urlresolvers does not exists in django2.0

[unijohn]

See for fix: https://github.com/kstateome/django-cas/pull/72