today we shall break format, for the following post is a multi-song extravaganza dedicated to the covers of nirvana. no, not nirvana songs covered by other people (that’s what nearvana – san francisco {linked here in both cd and mp3 format, respectively} is for). no, today we talk about the songs that nirvana has covered. it’s been weird to go through my nirvana collection. it’s been a long time since i’ve considered myself a big fan, and even then it…