merge dev_5_0 -Dorg -Ssuccess-only

Repository: openmicroscopy/bioformats
Updating 440626c..f660e3c
Previously merged:
  # PR 1380 hflynn 'Replace BigTiff sample link (rebased onto dev_5_0)'
  # PR 1372 sbesson 'Document usage of setSeries() and getIndex() in MATLAB documentation (rebased onto dev_5_0)'
  # PR 1367 hflynn 'Adding external PR guidance to CONTRIBUTING.md (rebased onto dev_5_0)'

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