Having started from such humble beginnings, the Foo Fighters really have come a long way. Who honestly could have called it, that the drummer from that band where the lead singer killed himself would eventually become one of the more vital figures in mainstream rock? The thing about Dave Grohl is that the man actively seems to want us all to be better. He wants us to know about the bands and the sounds that shaped his music, partially to help us appreciate his records in a whole new light, but mostly to make sure that some of the more…