merge develop -D org: PR 799 (Linux walkthrough (rebased onto develop))
merge develop -D org: PR 824 (OME DCO)
merge develop -D org

Repository: openmicroscopy/ome-documentation
Updating 8dc46c7..ce9ffbe
Merged PRs (fast-forward):
  # PR 849 hflynn 'Reformatting VA docs to make them less scary  (rebased onto develop)'
  # PR 846 hflynn 'Insert OMERO sidebar template after page TOC sidebar (rebased onto develop)'
  # PR 850 hflynn 'Re-working OMERO sysadmin index page (rebased onto develop)'

Merged PRs:
  # PR 799 manics 'Linux walkthrough (rebased onto develop)'
  # PR 824 sbesson 'OME DCO'Conflicting PRs (not included):
  # PR 834 aleksandra-tarkowska 'Session engine'
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