Fixed a potential bug in image cutouts
Fix for ellipse drawing when axes are swapped
Tweaks to reference viewer size

- made image attribute private in viewer
- bumped release
Updates for reference viewer for mosaicing

- fixes for support of alternate image loaders in Thumbs and Contents
Added editing mode

- edit mode added to Drawing mixin
- changes to all graphics shapes to allow them to be edited on the canvas
- work in progress
Disabled draw-scroll by default

- bumped release
Fixes for shape editing
Updates to canvas image types and editing them

- can now edit canvas image types (move, scale)
Fix for drawing ellipses and associated control points

- much more maintainable method found for drawing ellipses
- fixes drawing of edit points, etc.
Fixes for drawing

- added delete object--press z while in edit mode and object selected
- bumped release