[CM] CM + CLM / installation instructions wrong

[Larry Troxler]

I just got stumped for a few minutes again, trying to build a Common Music 
image (in Common Lisp) that has CLM included. Then I remembered it was 
documentation problem.

The readme, together with the instructions you get after running the cm.lisp 
script the first time, are wrong. Restarting Lisp, and reloading the cm.lisp 
script doesn't work. Instead you must also reload CLM before loading cm.lisp 
the second time.

I remember mentioning this quite a while ago - I guess it got lost.  Happens.

Larry