Abilene Community Theater is presenting Sound of Music this week end and next and, we are assured, the theaterwill be comfortably cool.«►It wasn't so early opening night,First nighters showed a quick tendency to loosen collars. Pretty soon they started shedding coats. Man, it was hot!It was not until deep into the show that the cause of the air conditioning failure w a s determined One of the youngsters in the show had hung his jacket on the switch and flipped it to “off ” Now he, after counseling, uses a coatrack.