fix README

README.md

@@ -13,13 +13,19 @@ for now though.
  - This javascript terminal window is 80x24 characters, so it might be
    best to adjust your terminal window to that size as well using the
    following to check:
+
       $ watch "tput cols; tput lines"
+
  - Start recording:
+
       $ SHELL=/bin/sh TERM=vt100 script -t typescript 2> timingfile
+
  - Do your stuff and when done exit script with `exit`, `logout` or
    ctrl-d.
  - To test how your recorded session looks like, use:
+
       $ scriptreplay timingfile typescript
+
  - Enter `timingfile` and `typescript` into form above and hit the play
    button.