Clean up some uses of hasattr; no need to support 1.1 any longer.
Clean up some uses of hasattr; no need to support 1.1 any longer.

kezabelle/django-model-utils,patrys/django-model-utils,patrys/django-model-utils,carljm/django-model-utils,timmygee/django-model-utils,yeago/django-model-utils,nemesisdesign/django-model-utils,timmygee/django-model-utils,carljm/django-model-utils,nemesisdesign/django-model-utils,kezabelle/django-model-utils,yeago/django-model-utils