Bugfix: Enlarge drill size for pin headers from 0.8 mm to 1.0 mm

Enlarge 0.8 mm drill holes to 1.0 mm for good fit with pin headers. NUCLEO-HEADER has added silkscreen layer, tDocument layer for creating assembly pictures and keepout layer to prevent components being placed closer than 0.5 mm from part.

DIN 49073-1:2010-02 is not modified, it still has 0.8 mm drill holes.

Please review carefully.