travis: Switch from raring to saucy

raring has been removed from the mirrors and was no longer supported
Merge pull request #872 from rleigh-dundee/travis-saucy-dev50

travis: Switch from raring to saucy
add note about consequences of "damaging" in-place import files
Expand setup.py test/py.test options description

- Use sphinx option markup for clarity/cross-referencing
- Put -h/--help at the top of the option list
- Add description for --markers option of setup.py test
- Add description for --repeat option of py.test
sysadmin: Make 9.2+ the recommended PostgreSQL version
sysadmin: Update the windows PostgreSQL docs
sysadmin: Update recommended PostgreSQL version to 9.2 in installation notes
Move configuration properties glossary at the end of the section
Implemented fixes suggested by Colin
Merge remote-tracking branch 'origin/dev_5_0' into 5.0.3_cli
Merge remote-tracking branch 'origin/dev_5_0' into omero_properties
sysadmin: Refer to trac floating point ticket #12466
Merge pull request #863 from sbesson/omero_properties

OMERO.server properties: documentation template
Slightly expanded re-indexing intro
New CLI reindex commands
Clarify *when* to re-index
Migrate troubleshooting text to search.txt
Add note about fewer results during indexing
Fix indent in bullets
Clarify that FileAnnotations are not under 'annotation:'