Labor Day marks the unofficial end of summer, so the holiday weekend is usually a time for families and friends to gather for one last warm-weather hurrah.For anyone throwing an end-of-summer party, it's fun to mix things up with some variations on classic side dishes. These three dishes will go great with hamburgers, hot dogs, barbecue or whatever else is being grilled during a final salute to summer. BACK-TO-SCHOOL LUNCH AND DINNER IDEAS THAT ARE QUICK AND EASYHere are three side dishes that can bring some unexpected flavors to Labor Day parties."The spicy sesame peanut noodles are a great twist on a