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    Implement a new atan method that is 21 times faster. · b9a21f1f
    Raymond Toy authored
    The new method uses a table and the taylor series for atan to compute
    atan for real args.
    
    qd-const.lisp:
    o Add the two tables used for the atan computation.
    o Include clisp code that generates the tables.
    
    qd-fun.lisp:
    o Implement atan using a set of tables and a Taylor series.
    
    timing.lisp:
    o Add a simple timing program to evaluate how fast each atan method
      is.
    b9a21f1f