Move schema-changes page from OMERO to Contributing documentation
Move commit extlink to Contributing documentation
Improve the description of the OMERO-5.1-breaking-upgrade job
Move conflict section to the top of the schema changes page
Add paragraph about schema changes review workflow
Move updating SQL scripts section together with Updating the schema
Fix double space and add hyphen
Merge pull request #704 from sbesson/schema-changes

Move schema changes to the contributing documentation