Fix 5D Imspector support (rebased onto develop)



This is the same as gh-1061 but rebased onto develop.

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See gh-1045 and http://trac.openmicroscopy.org.uk/ome/ticket/12035.  To test, verify that builds are green and that the files in both QA issues mentioned in the ticket open or import as described in the corresponding forum/mailing list threads.

/cc @imunro