Outstanding
-----------

    - Implement CAR
    - Implement CDR
    - Implement FORMAT
    - Implement FIRST
    - Implement lambdas
    - Implement LAST
    - Implement LIST*
    - Implement macros
    - Implement arithmetic comparisons
    - Implement packages
    - Implement READ and PRINT
    - Implement SETF
    - Redefine DEFUN as a macro
    - Help for property list
    - Help for keyword
    - Help for symbol
    - Help for sexp
    - Help for number
    - Help for string

Partially Done
--------------


Done
----

    D Implement keywords
    D Implement GETF
    D Add ' notation for quote
    D Define NIL
    D Define T
    D Implement DEFPARAMETER
    D Implement DEFVAR
    D Implement IF
    D Implement LET
    D Implement LET*
    D Implement LIST
    D Implement PROGN
    D Implement QUOTE