Added missing pull-ups on /IRQ and /DMA in cartridge expansion section (part of missing RP4 resistor network)

Added missing pull-ups on /EXROM and /GAME in cartridge expansion section (part of missing RP4 resistor network)

Added missing pull-ups on A12-A15 in I/O section (part of missing RP4 resistor network)

checked all diaodes (except in RF mod.) in KiCad schematic BOM against Service Manual parts list

removed unused file

Merge branch 'master' into Commodore/C64/251469.mk2

checked all inductors (except RF mod.) in KiCad schematic BOM against Service Manual Parts List

checked all transistors in KiCad schematic BOM against Service Manual Parts List

Merge pull request #39 from Cumbayah/Commodore/C64/251469.mk2 Initial capture of Commodore 64, schematic 251469

added .gitignore for -bak files generated by Kicad