Warm Crab Dip with Fresh Herbs

Name: Warm Crab Dip with Fresh Herbs
Ingredients: 4 tablespoons unsalted butter; 2/3 cup coarse fresh breadcrumbs; Salt; 1 large shallot, minced; 1 tablespoon dry vermouth; 3/4 cup cream cheese (6 ounces), softened; 1/4 cup crème fraîche or heavy cream; 1/4 cup mayonnaise; 2 tablespoons Dijon mustard; 3 tablespoons minced chives; 2 teaspoons finely chopped tarragon; 1 1/2 pounds jumbo lump crabmeat, drained and picked over; Cayenne pepper; Pita chips or toasted baguette slices, for serving