Release v0.3.0

Added

• Add Makefile
  • handle cleaning the build environment, the local Git repo and other
    temporary content
  • handle building binaries for Windows and Linux
• Add test environment setup script
  • used by Makefile; usable separately if desired
• (optional) Match files based on age threshold (in number of days)

Changed

• Update .gitignore file to exclude temporary files generated by UPX
• Update README to provide build and, test environment setup directions
• Refactor threshold helper functions in an effort to more clearly reflect
  their purpose
• Update logging to include more structured fields

Fixed

• Fix link to section in README

References

• See the v0.3.0 milestone for the issues associated with this release.
• See our CHANGELOG for more information