At Le Castellas, to guess who else is coming for dinner is always part of fun.  You can count on the goats, but we’ve also been joined by cats, dogs, sheep, and pigs. On our last visit, a horse came to the table and a fox watched from a short distance. Deep in the very heart of the Luberon, about 22 kilometers (a little over 12 miles) from our favorite village Lourmarin, lies the tiny village of Sivergues.  With an elevation of 584 meters (1917 feet), it is the highest inhabited village in...