Removed utils file and moved map_path function to settings.py.
Refactored tests for Python 2 and 3 compatibility.
Added inheritance check to get proper determination if a SortableForeignKey field is defined but the specified model does not inherit from Sortable.
Updated readme.
Updated sample project to leverage new sorting_filters on Person model and admin.
Removed custom change list template for Person admin.
Fixed a problem with the detection of sortability of inline models at the template level that was preventing the drag-and-drop messaging in the template to be displayed.
Updated unit tests.
Updated version to 1.4.5.
Updated README with explanation of requirements for overriding queryset() on inline models.
Added extra models to sample project to demonstrate sortable models with custom querysets.
Improved JavaScript of sortables to be more efficient with better comparison checking.
Fixed highlighting of stacked inlines on sort finish.
Refactored how the sortable_by properties get populated by looping over the model fields until we get to the SortableForeignKey, then grabbing properties from the field and its related data.
Added backwards compatibility for pre 1.1.1 versions that still have sortable_by defined as a classmethod.
Need to address dynamic regroup template tag to see why categories are not being grouped properly in sample app.
Added highlighting to sorted inline.
Added migrations to add Note class to database.
Added SortableInlineBase for checking type of model specified in inline model subclasses Sortable.