Number symbols sequentially; intern specials for defmfun
Created file init/utility.lisp, which now includes make-symbol-cardinal and make-symbol-cardinals. These functions in turn will now take a list for name, and join the symbols together with "-", and will optionally intern in a package. In #'callback-args in callback.lisp, the args are now numbered sequentionally (still uninterned, but no longer gensymmed). In #'expand-defmfun-wrap in defmfun.lisp, the symbols for specials "dynfn" and "cbfn" that are made are now interned, numbered sequentially, and named after the function in which they occur. This doesn't affect the functionality of the functions, it is just for readability of the macroexpansion. Expected tests pass.