Refs #15 - Permits to caches templates loaders by accepting 'complex' sequences, ie: https://docs.djangoproject.com/en/1.6/ref/templates/api/#django.template.loaders.cached.Loader.
Merge pull request #2 from novapost/15-fix-TEMPLATE_LOADERS-schema

Permits to caches templates loaders by accepting 'complex' List schema