Alex Lee

希望能支持 [TED ](https://www.ted.com)的视屏，其自带多国语言的字幕。 如果支持效果能接近目前对 youtube 的支持就更好了。

The `_results_to_docs_and_scores()` function should have returned the similarity score (higher values indicating more similarity), but erroneously returned the distance (higher values indicating less similarity). @rlancemartin, @eyurtsev