2019/09/23:  Pietro Coretto  <pcoretto@unisa.it>
================================================
   * Updated  CITATION file with updated references

	
2017/06/24:  Pietro Coretto  <pcoretto@unisa.it>
================================================
   * v 1.1
   * Old approximate EM algorithm replaced with ECM algorithm of Coretto and Hennig
     proposed in <https://arxiv.org/abs/1309.6895>
   * Parallelization introduced in otrimle()
   * Added CITATION file with updated references
