Update 1: Front and Bottom Layers are shifted and rotated accordingly. So they are always facing PCB side up.

Update 2: output gcode is now into appropriate filenames "front.gcode" and "bottom.gcode".

Update 3: Program cleans up after exit, unless you tell it to.

Update 4: Included "makefile". Now all you need is to type in 

make 

in the directory.