Update angular-modal-service.js

Possible to pass variables in the scope of the controller

Example:
ModalService.showModal({
                    templateUrl: "views/products/product.show.modal.html",
                    controller: "ProductsProductController",
                    init: {
                        action: 'show',
                        id: _id
                    }
})

On controller ProductsProductController:
if ($scope.action == 'show') {
        console.log('Action: SHOW');
};