Restore use of the environment variable as the release number
Merge pull request #364 from mtbc/rebased/develop/trac-10857

fix #10857: how to create a PR that changes the schema (rebased onto develop)
Add explanations for the hard-coded get_previous_version function

Also wrap the error in an Exception() when previous version is undefined
Use tuples rather than lists
Merge pull request #366 from sbesson/version

Fix OMERO version number generation
merge develop -D org -I include -E exclude: PR 365 (fix #10870: describe FS upload configuration)