Run by default without DEBUG to reduce memory load in production

[MikeTheCanuck]

hackoregon/civic-devops#139

[hassanshamim]

This is not what you want.

before the change:
If DEBUG is 'True' -> True
if DEBUG is 'False' -> False
if DEBUG is unset, or anything else -> False

After:
if DEBUG is "False", ("False" == "False" evaluates to True, so) Debug is True
if DEBUG is "True" ("True" == "False") -> False
anything else: False

I (personally) think a more clear approach would be:
DEBUG = bool(os.environ.get('DEBUG', False))
which takes the environment val DEBUG (or returns False if it's not set) and then casts it into a boolean value.

so 'True' -> True, and 'False' -> False.

[MikeTheCanuck]

damn, yes that makes a lot more sense. I'll update.