Synchronize docs with LOCI Bio-Formats content (rebased onto develop) (rebased onto develop)



This is the same as gh-665 but rebased onto develop.

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This is the same as gh-654 but rebased onto develop.

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This branch updates the OME Bio-Formats 4.4 documentation to include
missing content from the LOCI Bio-Formats site prior to redirects being
put in place. It also includes various updates, fixes and improvements
to the documentation noticed in the course of doing this work.