Extract footprint-center from F.Fab outline
Some footprints have weird pad shapes, making the F6.2 test fail. To fix this, we can also calculate the center of the F.Fab layer. Of those two possible center-locations, the one closer to (0,0) is selected. If Pads-center and F.Fab-center differ a warning is displayed.
This fixes the travis error for this PR https://github.com/KiCad/kicad-footprints/pull/951
Edited by Joel Guittet