Preheat oven to 350° F. Unroll crescent dough; separate into triangles. On 13" round baking stone, arrange triangles in circle with points in the center and wide ends toward the outside. Using lightly floured dough and pizza roller, roll out dough to 12-inch circle, pressing seams together to seal. Bake 12 - 15 minutes or until golden brown. Remove from oven. Cool completely. Using food chopper, chop spinach in 3 batches. In 1 quart batter bowl, combine cream cheese, 1 cup of the spinach, green onion, dill weed, pepper, 1/2 teaspoon of the lemon zest and lemon juice; mix well. Spread cream cheese mixture evenly onto crust. Using food chopper, coarsely chop crabmeat and olives. Top pizza with remaining spinach, crabmeat, olives and remaining 1/2 teaspoon lemon zest. Cut pizza and serve.