OptionParser.new do |opts|
  opts.on('-u', '--urgency LEVEL')           { |v| options[:u] = v } # Option gets removed
  opts.on('-t', '--expire-time TIME')        { |v| options[:t] = v } # Option gets removed
  opts.on('-a', '--app-name APP_NAME')       { |v| options[:a] = v } # TO DO: Set to -title
  opts.on('-i', '--icon ICON[,ICON...]')     { |v| options[:i] = v } # Option gets removed