Translate Model class' storage to C++.

Some code copied from xs-model branch.

Also:
* Generate ::Ref classes programatically.
* Add separate __REGISTER_CLASS macro
    (for use where forward declaration won't work, i.e. typedefs)

xs/xsp/typemap.xspt

@@ -1,12 +1,19 @@
 %typemap{bool}{simple};
+%typemap{size_t}{simple};
+%typemap{coordf_t}{simple};
 %typemap{std::string};
 %typemap{t_config_option_key};
+%typemap{t_model_material_id};
 %typemap{std::vector<int>};
 %typemap{std::vector<size_t>};
 %typemap{std::vector<unsigned int>*};
 %typemap{std::vector<double>};
 %typemap{std::vector<double>*};
 %typemap{std::vector<std::string>};
+%typemap{t_layer_height_ranges};
+%typemap{StringMap};
+%typemap{StringMap*};
+%typemap{Ref<StringMap>}{simple};
 %typemap{SV*};
 %typemap{AV*};
 %typemap{Point*};
@@ -25,6 +32,7 @@
 %typemap{Ref<BoundingBoxf3>}{simple};
 %typemap{Clone<BoundingBoxf3>}{simple};
 %typemap{DynamicPrintConfig*};
+%typemap{Ref<DynamicPrintConfig>}{simple};
 %typemap{PrintObjectConfig*};
 %typemap{PrintRegionConfig*};
 %typemap{PrintConfig*};
@@ -72,8 +80,33 @@
 %typemap{ExPolygons};
 %typemap{Surfaces};
 %typemap{Polygons*};
+%typemap{TriangleMesh*};
 %typemap{TriangleMeshPtrs};
 %typemap{Extruder*};
+%typemap{Model*};
+%typemap{Ref<Model>}{simple};
+%typemap{Clone<Model>}{simple};
+%typemap{ModelMaterial*};
+%typemap{Ref<ModelMaterial>}{simple};
+%typemap{Clone<ModelMaterial>}{simple};
+%typemap{ModelObject*};
+%typemap{Ref<ModelObject>}{simple};
+%typemap{Clone<ModelObject>}{simple};
+%typemap{ModelObjectPtrs*};
+%typemap{Ref<ModelObjectPtrs>}{simple};
+%typemap{Clone<ModelObjectPtrs>}{simple};
+%typemap{ModelVolume*};
+%typemap{Ref<ModelVolume>}{simple};
+%typemap{Clone<ModelVolume>}{simple};
+%typemap{ModelVolumePtrs*};
+%typemap{Ref<ModelVolumePtrs>}{simple};
+%typemap{Clone<ModelVolumePtrs>}{simple};
+%typemap{ModelInstance*};
+%typemap{Ref<ModelInstance>}{simple};
+%typemap{Clone<ModelInstance>}{simple};
+%typemap{ModelInstancePtrs*};
+%typemap{Ref<ModelInstancePtrs>}{simple};
+%typemap{Clone<ModelInstancePtrs>}{simple};
 
 %typemap{SurfaceType}{parsed}{
   %cpp_type{SurfaceType};