[Funimation] Rewrite extractor (See desc) (#444)

[Funimation] Rewrite extractor (See desc) (#444)

* Support direct `/player/` URL
* Treat the different versions of an episode as different formats of a single video. So `experience_id` can no longer be used as the video `id` and the `episode_id` is used instead. This means that all existing archives will break
* Extractor options `language` and `version` to pre-select them
* Compat option `seperate-video-versions` to fall back to old behavior (including using the old video IDs)

Closes #428