Jamaican Curry Chicken

Name: Jamaican Curry Chicken
Ingredients: Jamaican Curry Powder:; 1 tablespoon cumin seeds; 1 tablespoon mustard seeds; 1 tablespoon fenugreek seeds; 1 tablespoon anise seed; 1 tablespoon black peppercorns; 1 tablespoon coriander seeds; 1/2 tablespoon allspice; 1 tablespoon turmeric powder; The chicken:; -- One 5-pound chicken, cut into 8 pieces; -- Kosher salt, to taste; -- Freshly ground black pepper, to taste; 2 medium yellow onions, sliced thin; 4 cloves of garlic, minced; 1 tablespoon minced ginger; 2 tablespoons chopped fresh thyme; 1/2 medium Scotch bonnet or habanero chile pepper, minced (or to taste); 3 tablespoons vegetable oil; -- Juice of 1/2 lime; 5 cups chicken stock; 1 tablespoon butter