Today sees the streaming release of the documentary film Zappa from director (and Bill in the Bill & Ted series of films) Alex Winter.  Taking into account the many sides of the late, iconoclastic artist – from musician to activist, from boundary-breaking rock-and-roller to innovative composer – the movie has already received widespread acclaim.  Fully authorized by the Zappa Family Trust, Winter’s portrait of the artist incorporates rare archival footage alongside interviews with key family members and collaborators such as the late Gail Zappa, Steve Vai, Ian Underwood, Mike Keneally, Pamela Des…