Add support for continuous features or observations to the HMSVM
- Major changes in HMSVMModel
- Add convenience init_training method in StructuredModel
- TwoStateModel::simulate_two_state_data -> simulate_data with arguments
- Fix bug with default value of m_use_director_risk in StructuredModel cto.
Rename old HMSVM python examples to discrete and add new ones for PLiFs
Several minor improvements in the SO framework and the HMSVM