[CM] tap fixed - patch to tankrev.scm

[bil at ccrma.Stanford.EDU]

> Something which does the same thing as #. in CL

s7.html (under *#readers*) has a reader macro that
implements CL's #.

(set! *#readers*
   (cons (cons #\. (lambda (str)
		    (and (string=? str ".") (eval (read)))))
	*#readers*))

I actually haven't used it much -- let me know of bugs!