First, if you want to see theater in one of its most nerve-racking forms, look no further than actor Colin Mochrie. The comedian is best known for his role on TV’s “Whose Line Is It Anyway?” and he has a richly deserved reputation for his skill at improvisation. Audiences in Atlanta can see him live Friday, August 11, and tomorrow August 12 at Dad’s Garage. We talk with Colin Mochrie. Next, we add a couple more tunes to the Georgia Playlist, our essential list of songs that best represent