BC → Domain Relation

File in Constraint/BC	Includes file in Domain
GroupPenaltyBC.cpp	DomainBase.h
GroupPenaltyBC.cpp	Group / Group.h
MultiplierBC.cpp	DomainBase.h
MultiplierBC.cpp	Factory.hpp
PenaltyBC.cpp	DomainBase.h
PenaltyBC.cpp	Factory.hpp