Universally useful Lisp code that lives in package

The intent is that the base package only contains code that's highly likely to
be useful in every Lisp application.  Currently it contains:

    a nicer version of DEFCONSTANT
    a macro for generating simple PRINT-OBJECT methods
    a MISSING-ARGUMENT function for use in DEFCLASS forms
    functions for manipulating utf-8 strings stored as vectors of 8-bit octets
    common compiler optimization settings
    functions for extracting the prefix or suffix of a sequence
    Lisp type definitions for common C integer types
Robert Brown
New BSD license. See the copyright messages in individual files.