Stitching / Compositing

[heavyimage]

For Release 2, it'd be awesome to replace the need for photoshop and do compositing of multiple photograms into a single slice.

This breaks the faulty Milestone 1.0 assumption of one image per slice.

This would require:

• Multiple images could be imported / transformed / layered eg: multiple images at different magnifications.
• Perhaps non-linear transformations ala gridwarps?
• might want to go back to scope and replace an image with a higher resolution image
• might be hard to know how to automatically update shapes if image is tweaked in a complex way; maybe we just show a flag that indicates that the source slice has changed so the user knows to update their shapes...