AFI: populate magnification and physical pixel size metadata

Fixes #12360.
Fixing imglib scifio github link
Merge pull request #1185 from hflynn/rebased/develop/scifio-link

Fixing imglib scifio github link (rebased onto develop)
Merge pull request #1162 from melissalinkert/afi-metadata

AFI: populate magnification and physical pixel size metadata