Update wsgi.py
Update wsgi.py

The major difference is that this allows the root and virtualenv
directories to be set via the WSGI_ROOT and WSGI_VENV environment
variables, which is useful in some environments (e.g., Docker).

wylee/django-arcutils,wylee/django-arcutils,PSU-OIT-ARC/django-arcutils,PSU-OIT-ARC/django-arcutils