Added laser support to 3DWriter.

I changed my printer's firmware to repetier because it has laser support, Marlin can still be used but you need to connect the laser to an existing output such as the part cooling fan.

Download the latest version from github https://github.com/boy1dr/3DWriter

For more information see my youtube video

Since i have a laser enabled 3D Printer i decided to make a fidget spinner and laser engrave a graphic in to it

Turns out that using a laser on PLA 3D Printed parts is awesome!

More to come.