Dexterity needs another interface

[frisi]

currently for dexterity types you'll need to implement another interface (IImageCroppingScale) as archetypes (IImageCropping)

(see #21 (comment))

maybe we can find a way to make both work with the same single marker interface.
or we move IImageCroppingScale to plone.app.imagecropping.interfaces.dexterity.IImageCropping

anyway we should also document this in the readme so people know how to properly use it
(most stuff will work with iimagecropping, but the improvements for the lost scales (ticket #21) will not work.

[saily]

While refactoring the whole thing yesterday it came in my mind that for example IImageCroppingBehavior should be available to mark dexterity items as croppable. Why not implementing that one as a behavior?

[frisi]

that's a great idea.

[jensens]

meanwhile i at least split up the crazyness of mixture between at/dx a bit, now it should be very easy to make a behaviour here too. I'all open a new issue marked as enhancement.