Leetro MPC6515 support (various China Laser)

[MatthiasWM]

Two things:

1: I am stuck with the Leetro support. No no, I know what I am doing, but I simply do not have the time. I found out a lot more about the format, and I think I could reliably generate working files, but when? Any suggestions welcome!

2: I am a visual person. Outputting Leetro MOL files is nice, but seeing is believing, so I wrote a script plugin that imports MOL files into QCAD. In case there is any Leetro user/dev here, this is where you can download that:

https://www.ribbonsoft.com/rsforum/viewtopic.php?f=30&t=2436&p=7965#p7965