[C] re-write image shaper, wire up captions, etc. #74
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JIRA: https://jira.lsstcorp.org/browse/EPO-8628
What this change does
Do a re-write of the image shaper to get better resolution images and also pull in the captions, credits, and alt text from Canto. Canto plugin is experiencing a bug right now that is interfering with pulling in these fields, although the fields are being used.