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
Merge pull request #1089 from iglesias/feature/hmsvm_plifs

Support for continuous features with the HM-SVM using PLiFs
ptype complex64_t added
Merge pull request #1140 from lambday/develop

ptype complex64_t added
drop useless unused includes
real/imag(val) replaced by real()/imag()=val
Merge pull request #1141 from lambday/develop

real/imag(val) replaced by real()/imag()=val to make it work on non C++11 compliant compilers
 complex unit-tests fixed, JacobiEllipticFunctions updated
Merge pull request #1142 from lambday/develop

 complex unit-tests fixed, JacobiEllipticFunctions updated