RLS11 — Mismatch in Error Type (Figure 6) and Error Information (Figure 7) definitions

There are mismatches in the hierarchical structure of Error Type
classes and Error Information classes, which shall correspond to each
other. One solution will be to:

• add ET_ErrorDistribution, derived from 'RoLo Error Type'
• make ET_Gaussian, ET_UniformGaussian, ET_ParticleSet and
  ET_MixtureModel to be derived from ET_ErrorDistribution