added single screw terminals from MetzConnect
Created by: jkriege2
- see http://www.metz-connect.com/de/system/files/METZ_CONNECT_U_Contact_Katalog_Anschlusssysteme_fuer_Leiterplatten_DE_31_07_2017_OFF_024803.pdf?language=en from page 131
- script generated: https://github.com/pointhi/kicad-footprint-generator/pull/68
- complements https://github.com/KiCad/kicad-footprints/pull/35 (readme will be there)