Sends a POST to /1.0/domains/ using this post-data:

            {"domain": "www.fogfu.com",
             "description":"Added by tagcube-api"}

        :param domain: The domain name to add as a new resource
        :return: The newly created resource

def domain_add(self, domain, description=DESCRIPTION):
        """
        Sends a POST to /1.0/domains/ using this post-data:

            {"domain": "www.fogfu.com",
             "description":"Added by tagcube-api"}

        :param domain: The domain name to add as a new resource
        :return: The newly created resource
        """
        data = {"domain": domain,
                "description": description}
        url = self.build_full_url(self.DOMAINS)
        return self.create_resource(url, data)