v0.4.3

• Support completed field for objects in project config. In object tree, displays red for incomplete, green for complete.
• Add support for one-sided diffs. A project can include objects without an associated source file for viewing.
• Add versioning to the app's configuration, supporting upgrades without losing user configuration.
• Support min_version field in objdiff.json.

Full Changelog: v0.4.1...v0.4.3