Fail hard if relevant settings are not available

[mx-moth]

In the Readme, under TODO:

fail gracefully if the relevant settings aren't available

I suggest instead failing hard if the required settings are not available, by throwing an error as part of a Django app check. Missing settings are a configuration error that should be visible at the time of configuration. Failing softly later when a user browses to the analytics page leaves that user with no way of fixing it besides contacting the system administrator who forgot to add the settings in the first place.

[tomdyson]

Thanks, @timheap, you're right, of course!

[tomdyson]

note to self:

from django.conf import settings

if not hasattr(settings, 'GA_KEY_FILEPATH'):
   # error
if not hasattr(settings, 'GA_VIEW_ID'):
   # error