Fix Pin 1 Markers to fit with KLC (IPC suggestion)
Fixes https://github.com/pointhi/kicad-footprint-generator/issues/278 for DFN footprints
This is a manual fix to unify all Pin 1 markers to fit with KLC (IPC). The pull request only touches silk and fab outlines (fab only where the chamfer was way too large).
Edit: I do not intend to fix any of the other KLC issues in these.