ReferenceSpace reworking -- seems ok

FunctionSpace/FunctionSpace.cpp

FunctionSpace/FunctionSpaceScalar.cpp

FunctionSpace/FunctionSpaceVector.cpp

FunctionSpace/LineReferenceSpace.cpp

FunctionSpace/QuadReferenceSpace.cpp

FunctionSpace/ReferenceSpace.cpp

FunctionSpace/ReferenceSpace.h

FunctionSpace/TetReferenceSpace.cpp

FunctionSpace/TriLagrangeBasis.cpp

FunctionSpace/TriLagrangeReferenceSpace.cpp

FunctionSpace/TriReferenceSpace.cpp