Pete Doherty is set to be the subject of a new exhibition in Scotland that will showcase the drawings of prisoners who have been given the chance to attend a life-drawing class with the singer.Doherty, who has previously served time for drug offences, will take place in Pete Doherty v Barlinnie Prison, which opens inside the gates of the Glasgow jail on September 22.The exhibition will see curator and artist Joe Henry using the traditional life drawing class format to stage a performance with