Update version numbers to 5.0.4
Merge pull request #1282 from melissalinkert/5.0.4-version

Update version numbers to 5.0.4
merge dev_5_0 -Dorg -Ssuccess-only

Repository: openmicroscopy/bioformats
Already up-to-date.

Generated by OME-5.0-merge-push#210 (http://ci.openmicroscopy.org/job/OME-5.0-merge-push/210/)