The actress best known as Ron Howard’s little sister on the TV series ‘Happy Days’ has died.  Erin Moran, started as Joanie Cunningham in ‘Happy Days’ and her own show,  ‘Joanie Loves Chachi’. Cast mates Ron Howard and Henry Winkler, who played ‘Fonzy’ on ‘Happy Days’ shared messages  on social messages.  The New York Times has more here