A Sacramento yoga studio has been given the distinction of offering the first-ever yoga class on the White House lawn. Six instructors from Midtown-based Zuda Yoga are teaching several half-hour classes today as part of the annual Easter Egg Roll at the Capitol. "I like to think it came about because of good Karma and all the good things that we do at the yoga studio," said Zuda instructor of co-founder Anne Marie Kramer. But Kramer conceded it was also a who-you-know situation. Zuda instructor Leah Cullis is engaged to John Liipfert, the producer of C3 Productions who handled both Barack Obama's Election Night celebration at Grant Park in Chicago and his inauguration. Liipfert called th