TODO

 * Automatically create Changes
 * Check for uncommited changes
 * Don't copy perltidy.err/errors.err to distro
 * Make & config perltidy work automatically
 * Meaningful tests
 * Minimal Perl version if not set
 * Validate that the most recent version of the plugin is installed
 * Combine both Test::EOL and Test::TrailingSpace, and run only for
   author.
 * AUTHOR_PLEDGE should not refer to Joelle directly
