Tidy up messages a bit.

README

+Run copy_keys.sh with
+
+bash copy_keys.sh
+
+When prompted enter the password "maker"
+
+Then run the startup script with
+
+bash script.sh
+
+Wait for the message "EV3 Ready." to be displayed, then go to the URL it gives you.

copy_keys.sh

+#!/bin/bash
+ssh-copy-id robot@10.42.0.3

snap-ev3.py

@@ -49,6 +49,7 @@ print "Starting listener on EV3"
 os.system('scp listen.py %s@%s:' % (EV3_USER, EV3_IP))
 os.system('ssh %s@%s -- "nohup python3 listen.py %d > listen.log 2>&1 &"' % (EV3_USER, EV3_IP, EV3_PORT))
 
-print ('http://cs10.org/snap#open:http://localhost:1330/snap-ev3')
+print("EV3 ready.")
+print('http://cs10.org/snap#open:http://localhost:1330/snap-ev3')
 httpd = TCPServer(("", SNAP_PORT), Handler)
 httpd.serve_forever()