Initial commit of the Epson QX-10 Keyboard module

- LEDs are working
- Reset command is working
- Basic typing is working (USB side drops some characters)
- Changing repeat rate is working
- Querying modifiers and LEDs is working
- Initial layouts are complete
- Modifiers are not fully working yet

main.c

@@ -108,7 +108,9 @@ int main(void)
 	while ( 1 )
 	{
 		// Setup the scanning module
+		cli();
 		scan_setup();
+		sei();
 
 		while ( 1 )
 		{