qd-rep.lisp:

o Fix typo in compiler macro for sub-d-qd

qd.lisp:
o Use 3-arg versions in div-qd-t to speed things up.  Approximately
  doubles the speed with clisp.

qd-fun.lisp:
o Use 3-arg versions in sqrt-qd to speed things up.  Approximately
  doubles the speed with clisp.