Now we track whether an adjustment uses areas or not.
Now all adjusted images based on the same storage path are deleted when a new area is defined (for fill and crop).
Now the adjusted images also are deleted when you delete an area.
Fixed the tests and now it passes tox!
Pass *args and **kwargs to the super call on save(), for consistency.
Changed the super save/delete other adjusted img call order and DRY-ed it up a bit.
Added a blank line.
Merge branch 'master' into ticket/41
Added tests for deleting adjusted images for areas.
Merge branch 'ticket/41'