Add proper data ports and data streams handling

Add new methods: onNewModel() and onJointMultiplicity().
Implement setBaseFeaturesCPTs() method

which sets base CPTs of all feature nodes based on
jointMultiplicityVector.
Add empty mapFeaturesNames() method, maping position of feature in vector to
feature name.
Map feature id to name
Accept map on input. Implement exportNetwork()

Map contain position of concrete model's feature in
jointMultiplicityVector and multiplicity value of feature in this
particular model.