Link to song or song melody

[Cactooz]

Add a tag that can link to the specific song or if that does not exist, then the original song melody.
Stockholms Universitet has a lot of the songs already on Spotify that we can use (as long as it's the same lyrics etc. of course).

This will make it easier for new people to learn the songs if they haven't heard it before.

[StelFoog]

Great feature! I think we should generally only link to the original melody, so that the lyrics can evolve on their own (with callouts, changes, what have you).