Warnings, resiliency, and bump version to 0.0.3

[smudge]

• [X] Clear out warnings about unused methods.
• [X] Add some small amount of resiliency to breaking changes on newer macOS versions - if more data is written to the "status" struct than is expected, we output a loud "WARNING" to stderr. At the very least, this will prompt someone to post an issue and help us know when to update the struct.