Merge pull request #958 from hflynn/build-system

Delete OMERO tools build info
Update server-postgresql.txt

adding the ip6 equivalent - my first installs on CentOS I missed this, and was baffled why the DB connection was failing - it didn't help that this wasn't in the docs.
adding ip6 connection line to pg_hba.conf

I was following the docs on my original CentOS installs, where the IP6 local connection was being tried and failing, since this was missing from the docs.
Moving walkthros up a level in TOC
merge develop -Dorg -Ssuccess-only: PR 961 (adding ip6 pg_hba.conf connection line)
merge develop -Dorg -Ssuccess-only: PR 962 (adding ip6 connection line to pg_hba.conf)
merge develop -Dorg -Ssuccess-only: PR 963 (Moving walkthros up a level in TOC)
merge develop -Dorg -Ssuccess-only

Repository: openmicroscopy/ome-documentation
Updating 161993e..a0ec2c4
Previously merged:
  # PR 958 hflynn 'Delete OMERO tools build info'

Merged PRs:
  # PR 961 kennethgillen 'adding ip6 pg_hba.conf connection line'
  # PR 962 kennethgillen 'adding ip6 connection line to pg_hba.conf'
  # PR 963 hflynn 'Moving walkthros up a level in TOC'

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