One of the best things about summer-Picture 101besides the good weather- is being able to enjoy amazing theater in the great outdoors. Dallas puts on a fabulous Shakespeare in the Park Summer Series that begins in June and goes through to July. In June, though, you have the choice of two great Shakespearean plays. The first to open the series is Cymbeline, a tragedy/romance loosely based on the legends of the early Celtic British King Cunobelinus. Later in the month, and on through July, is one of Shakespeare’s earliest plays, Comedy of Errors. Moving into a different direction, this is short and slapstick happy in a story that deals with mistaken identities and a flurry of puns and wordplay.