In SVMModel class, add methods:

TODO : alpha and svm_predict_values.... voir Gregoire.
  /** Return number of support vectors */
  int GetNumberOfSupportVectors(void)
  {
        return m_Model->l;
  }
  /** Return rho values */
  double * GetRho(void)
  {
        return m_Model->rho;
  }
  /** Return the support vectors */
  svm_node ** GetSupportVectors(void)
  {
  		return m_Model->SV;
  }