Feature request: download transcript in preferred language

[merberich]

Coursera offers transcript downloads for some videos, and it would nice to be able to get those on download (instead of having to parse the subtitles file when available). Im imagining an argument to list (in order) language preferences for this:

# download slug "sssss" resources in English if available
# or French when English is unavailable
# (defaults to the default course language if none available)
dl_coursera --cookies ccc --slug sssss --lang EN FR

Side question: do you take pull requests?

[FLZ101]

Currently only English subtitles provided are downloaded, in the next release all subtitles provided will be downloaded.

[FLZ101]

Pull requests are welcomed, however before that I plan to update it to version 1.0, which should be much easier to use.