Change the table of supported Ice/OMERO versions.

Note Debian 6.0 supports ends in May 2014 and provided ice-3.3. Restricting the supported versions to 5.0 instad of 5.x gives us the opportunity to drop ice-3.3 if we wish.
Reformat table
merge develop -D org: PR 626 (Add new Squash tutorial and screenshots)
merge develop -D org: PR 714 (Update supported Linux versions for 5.0 (rebased onto develop))
merge develop -D org

Repository: openmicroscopy/ome-documentation
Already up-to-date.

Merged PRs:
  # PR 626 pwalczysko 'Add new Squash tutorial and screenshots'
  # PR 714 manics 'Update supported Linux versions for 5.0 (rebased onto develop)'

Generated by OMERO-5.1-merge-push#130 (http://ci.openmicroscopy.org/job/OMERO-5.1-merge-push/130/)