indubitablement2

Not initialising time_emit under GDExample::_init() prevent signal from firing.

- Add advance method on Bresenham that return the next point without checking if we are past end. Bresenham iterator use this internally. It could also be used to create...

Fix https://github.com/mbr/bresenham-rs/issues/2 Also added an advance method on Bresenham which return the next point without checking if we are past end point. No breaking change.