Add makefile target for running in simulated environment

src/main.c

@@ -65,8 +65,6 @@ static int Init(void)
 	// - Wrong fuses? Unlikely.
 	// - Bootloader problems?
 
-	return 0;
-
 	// The watchdog timer is clocked from a separate
 	// on-chip oscillator which runs at 1 MHz. Eight
 	// different clock cycle periods can be selected
@@ -242,13 +240,10 @@ int main(void)
 
 	for (;;) {
 		WDT_Reset();
-		Info("UPDATE");
-		continue;
-		// Update();
+		Update();
 		WDT_Reset();
 		Sleep(1000);
 	}
 
-	UNUSED(Update);
 	return 0;
 }