Mention autofocuser

Author: Lee Braiden

README.md

@@ -16,6 +16,7 @@ This is a SIMPLE command-line frontend to lots of astrophotography tools. It's f
 - An IR-capable astrophotography camera, on said telescope
 - (Especially for an Alt-Az mount) an autoguider and autoguider camera, either attached to the telescope mount directly ("internal") or via your computer
 - A USB-controlled filter wheel
+- An autofocuser
 - INDI compatibility for all of the above
 
 ## Ideal