Refactored translated_fields to take a model, rather than field names as arguments.
Refactor and cleanup model mixins.
Refactor of all API urls.
Refactor of filters; refactor of managers for API performance.
Refactor of web API to all entity models
Some leftovers in the change to translated_fields taking a model object.
Adding a period method to templates. And, some extra comments on PeriodicModel.period.