Preparing release 1.10.1
Back to development: 1.10.2
Implement upgrade step directory scanner.
Implement upgrade step directory directive.
Automatically set profile version to latest upgrade version.
Extend UpgradeStep with ``install_upgrade_profile`` method.
Extend importProfile directive with new optional "handler" argument.
Wrap upgrade step handlers with profile information.
Implement marking installed upgrade steps.
Update gatherer to include orphan information.
Highlight orphan upgrade steps in manage view.
Update translations.