Django-bakery

- `get_year` fix on the year archive view.

- `get_absolute_url` bug fix on detail view.

- Upgraded to Django new style of management command options.

- Added new date-based archive views BuildableArchiveIndexView, BuildableYearArchiveView, BuildableMonthArchiveView, BuildableDayArchiveView
- get_url method on the BuildableDetailView now raises a ImproperlyConfigured error
- Refactored views into separate files

- Improved error handling and documentation of BuildableDetailView's `get_url` method.

- Patch provided backwards compatibility to a previous boto bug fix.