Go: Add toString.
%ignore tinyspline::DeBoorNet::operator=;
%ignore tinyspline::Domain::operator=;
+%rename (string) tinyspline::BSpline::toString;
+%rename (string) tinyspline::DeBoorNet::toString;
+%rename (string) tinyspline::Domain::toString;
+
%insert(cgo_comment_typedefs) %{
#cgo LDFLAGS: -L${SRCDIR} -ltinysplinego -Wl,-rpath,${SRCDIR}
%}
