2264: Added in and out test for subtitles upload, just to be safe.

We were encoding content with 'replace' on babelsubs, this would silence encoding errors and loose data. I've fixed this on babelsubs on https://github.com/pculture/babelsubs/commit/fc4270e95c21e9be8b7567a9bca6efa14d01f96f . Babelsubs should now be unicode friendly.