Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Gregory Jefferis <jefferis@gmail.com>’
  
  Found the following (possibly) invalid URLs:
    URL: https://github.com/jefferis/bmp/tarball/master
      From: README.md
      Status: 404
      Message: Not Found

No changes to worse in reverse depends.