Merge branch 'attiny' of https://git.omegav.no/ov/ov-can-node into attiny

Adding REAME file

OV-CAN-Connectors.Harness

-PINOUT=PA6,PA7,PB5,PB4,PC1,PC0
-Uart=TXD,RXD
+PINOUT=PA1,PA2,CLKI/PA3,PA4,PA5,PA6,PA7,PB6,PB5,PB4
+Uart=TxD,RxD

OV-CAN-MCU.Harness

-PINOUT=PC1,PC0,PB4,PB5,PA7,PA6
-SPI=MOSI,MISO,SCK,S\S\,INT
-Uart=RXD,TXD
+PINOUT=PB6,PB5,PB4,PA7,PA6,PA5,PA4,CLKI/PA3,PA2,PA1
+SPI=INT,S\S\,MOSI,MISO,SCK
+Uart=RxD,TxD