Implement Basic Image Editing

[Webreaper]

Add the ability to edit images directly in Damselfly, for export.

The editing will be completely non-destructive - changes will be stored in a transaction log in the DB alongside the image, and applied at display/render time. You'll then have the option to export the photo with the edits applied. If I can find appropriate standards, I'll also write the trans-log to the XMP files, so that some of the edits will also be applied in other software (Lightroom, Digikam, etc).

I'm tentatively starting with the following:

• Rotate
• Flip
• Crop
• Lighten
• Darken
• Adjust saturation
• Monochrome / black & white

Please comment if you have other suggestions. Bear in mind, I'm not building Lightroom. :)

[Webreaper]

Standard for storing Crop info in XMP: https://photo.stackexchange.com/questions/43893/how-to-store-tilt-rotation-and-crop-information-in-metadata