Revert "Remove commented environment variables that should be set in a dotenv file."
Revert "Remove commented environment variables that should be set in a dotenv file."

ae2ce1dae92b36fc06cdecf84183c56556fe4d89

These are here for people running ICEkit directly (not via a project),
because they are unable to create a dotenv file.

ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit