A humorist looks outward and sees the world," Observed Jean Shepherd. "A comic looks inward and sees himself." It was a practiced reply, but then Shepherd is a practiced humorist, not a comic; he's been performing and writing in his highly individualistic way for two decades. Thursday night at 9, on Channel 13, viewers will see what is perhaps his most ambitious project to date, a full-length play entitled "Phantom of the Open Hearth" on the PBS "Visions" series...