add missing mesh definitions
make_renderable.hh contains definitions for make_renderable(std::vector<std::pair<Pos3, Pos3>> const& pos)
and make_renderable(std::vector<std::array<Pos3, 2>> const& pos)
which both simple call viewer::lines(pos)
.
viewer::lines
calls make_mesh_definition(pos)
which did not exist for std::vector<std::pair<Pos3, Pos3>> const&
and was using a wrong implementation for std::vector<std::array<Pos3, 2>> const& pos
(which failed trying to add faces with only two vertices).