Not to butt into today’s important stories about panda dancing, mail trucks and free french fries or anything — but I’d be remiss if I didn’t pass along the news that my predecessor, DCist editor emeritus Sommer Mathis, has been named the new Editorial Director at Washingtonian.com. Sommer’s actually the second DCist alum to take the editorial reins at Washingtonian, joining former editor Catherine Andrews — she tells me that, in addition to working on…