Adaptor2d → gp Relation

File in src/Adaptor2d	Includes file in src/gp
Adaptor2d_Curve2d.hxx	gp_Circ2d.hxx
Adaptor2d_Curve2d.hxx	gp_Elips2d.hxx
Adaptor2d_Curve2d.hxx	gp_Hypr2d.hxx
Adaptor2d_Curve2d.hxx	gp_Lin2d.hxx
Adaptor2d_Curve2d.hxx	gp_Parab2d.hxx