Drawbot Inkscape GCode Exporter plugin

This is a modified version of the J Tech Photonics Laser Tool plugin for Inkscape that utilises the same laser power-on delay in the moment immediately after a stroke is drawn, while the servo is lifting the pen, to prevent additional pen-marks at the end of the stroke.

For an example image of the difference this makes see this image. Before on the left and after on the right: https://www.julianbutler.com/Art/Plotter/i-4KP9wjM/A

Here are two example snippets of GCode showing the difference this change makes... I've annotated it to make it clearer with '