Section3D → Toolbox Relation

File in Section/Section3D	Includes file in Toolbox
Box3D.cpp	IntegrationPlan.h
Circle3D.cpp	IntegrationPlan.h
CircularHollow3D.cpp	IntegrationPlan.h
ISection3D.cpp	IntegrationPlan.h
Rectangle3D.cpp	IntegrationPlan.h
Section3D.h	ResourceHolder.h