This Octopress plugin is pretty simple. You have to use the spotify liquid
tag and, as param, one of the examples you'll find in the blog post where I
talk about the
plugin.
In the next release it will let you specify the height and the width of the widget. I hope it won't take very long :)
Just download the spotify_play.rb file into your Octopress installation's
plugins/ directory and you'll be fine.
spotify spotify:track:4vVE8YDntxjT0gld4bdd4x
spotify spotify:album:2B9q4KPjOEYu885Keo9dfX
spotify spotify:user:mrc2407:playlist:1O9JUUKiMqA8LXahz61fCH
spotify spotify:trackset:PREFEREDTITLE:5Z7ygHQo02SUrFmcgpwsKW,1x6ACsKV4UdWS2FMuPFUiT,4bi73jCM02fMpkI11Lqmfe