Gemfile: add sketchily image_question_answer.rb: add annotation field.
Fix typo in image_question_answers runtime view. (sketchily) height %400
Remove unused toolbar and buttons in the svg editor.

[#53245137]
Gemfile changes: Bump Shutterbug, change sketchily to point at CC branch
Shutterbug: Use local rack service (same origin for SVG?)

[#53245137]
https://www.pivotaltracker.com/story/show/53245137
A student can see the snapshot as they annotate the image question answers.