qd-const.lisp:

o Add code for clisp to create the constants we need.  (Clisp has
  arbitrary length long-float numbers.)
o Update the constants accordingly.
o Move the atan table stuff for CORDIC to qd-extra.lisp, since we
  don't need them in oct itself.

qd-extra.lisp:
o atan table stuff for CORDIC moved here.