Image anntoation MVP

[RFSH]

Must have,

• [x] Deterministic output SVG (style vs. attribute, etc.) (#39)
• [x] Add default color to annotations that don't have any color (when the input SVG doesn't have any color).
• [x] Handle thickness in multiple zoom levels
  • Test on non-CZI images
  • Add URL parameter to turn this on/off (opposite of what the heuristics are going to be)
• [x] Proper URL parameter handling
  • make sure they are following the same naming convention
  • update documentation
• [x] Screenshot issue (#35)
• [x] Scalibiltiy improvements in Chaise.
• [x] Add color block to anatomy term corresponding to color used in annotation (#41)
• [x] Logging support in Chaise.

Good to have,

• [x] Edit discard bug (undo) (#42)
• [x] Improve SVG performance in osd viewer.
• [ ] Make the annotation lines easier to click (#34)
• [ ] Disable the osd toolbar in non-draw mode (instead of hiding it.)
• [ ] Channel vs. Scene (#25)
• [ ] Error handling (bare minimum)

[RFSH]

I'm going to close this epic as the original "Must have" list is done.