1.1
  * Generated GIFs are now 100x100 pixels.
  * A workaround to silence shellcheck SC2059 was submitted by Bastian Bittorf.
1.0.5
  * Nicer HTML output.
  * Fixed an error in the documentation (wrong color values in example).
1.0.4
  * Bugfix of bugfix in findsingle().
1.0.3
  * Bugfix in findsingle(): better matching with awk should ensure
    just one match.
  * Added changelog.
1.0.2
  * Comments in rgb.txt (lines starting with !) are not processed.
  * Cleanup.
1.0.1
  * Neater conversion to octal.
1.0
  * Initial release.
