LDCad Set PBG generator

[Philippe Hurbain]

I finally found this bug. Basically its that there's a sticker sheet with the number 004589 and a part with the number 4589. So it's a number conversion problem. It's gonna be a bit before it's fixed since I have to add a new field to the CSV file or improve part match logic (whichever proves to be more efficient)

A little request (I guess it should rather go to Roland actually...): in LDCad, I can't search for set description, only for set number. That improves if the pbg file name is extended to contain set description...