refactor bin/mixologist.dart to use common code
refactor bin/mixologist.dart to use common code

ronlobo/streamy-dart,ronlobo/streamy-dart,google/streamy-dart,google/streamy-dart,ronlobo/streamy-dart,google/streamy-dart,srawlins/streamy-dart,google/streamy-dart,srawlins/streamy-dart,srawlins/streamy-dart,ronlobo/streamy-dart,srawlins/streamy-dart