`cart_name` - Name of this release cart
        `manifests` - a list of manifest files

def create_manifest(self, cart_name, manifests):
        """
        `cart_name` - Name of this release cart
        `manifests` - a list of manifest files
        """
        cart = juicer.common.Cart.Cart(cart_name)

        for manifest in manifests:
            cart.add_from_manifest(manifest, self.connectors)

        cart.save()
        return cart