added porcupine4v1_8 to the repository
porcupine4v1_8: added extension pins
porcupine4v1_8: some wires rewired
4.1.8 added bom & fixing
porcupine4v1_8: updated extension pins (names), shifted some vias
porcupine4v1_8: BOM-list updated
porcupine4v1_8: updated component layout
porcupine5: added OLED version
updated oled schematic
updated oled board
OLED version updated
OLED version update wiring
OLED version updated components names and values
OLED version updated wiring
OLED version: update wiring, added layout docs