add a note on sudo password

install.sh

@@ -50,7 +50,7 @@ download() {
     echo "Could not install." && exit 1
   fi;
 
-  echo "This script needs root privileges in order to install into $BIN_DIR."
+  echo "Installing to $BIN_DIR... (it might require sudo password)"
   sudo install -c -m 0755 $FILENAME $BIN_DIR/arpfox
   rm $FILENAME
 }