Update README.md

README.md

@@ -57,3 +57,4 @@ TODO: write detailed instructions.
 
 1. Make a startup service that starts the webcam server.  Need to issue the shutdown command via the webpage to avoid potential corruption of SD card.
 2. Would be great to adjust field of view without disassembling the scope.  Maybe as simple as an access hole for adjusting knob.
+3. Figure out how to use for Registration, not just Reference in ZCC.