Using emotions for the development of human-agent societies<FootNote> Project supported by the Ministerio de Economia y Competitividad of the Spanish Government and the European Regional Development Fund of the European Union (No. TIN2015-65515-C4-1-R) </FootNote><FootNote> A preliminary version was presented at the 13th International Conference on Practical Applications of Agents and Multi-Agent Systems, June 3–4, 2015, Spain </FootNote>