Lua operators.
%rename (__tostring) tinyspline::BSpline::toString;
%rename (__tostring) tinyspline::DeBoorNet::toString;
%rename (__tostring) tinyspline::Domain::toString;
+%rename (__tostring) tinyspline::Frame::toString;
+%rename (__tostring) tinyspline::FrameSeq::toString;
+%rename (__tostring) tinyspline::Vec3::toString;
%rename("%(undercase)s", %$isfunction) "";
%rename("%(undercase)s", %$ismember, %$not %$isconstructor) "";
