FriCAS Code

Misc cleanups.

Eliminate DCQ and DSETQ macros.

Rename change logs.

optimize SPADCALL, it expects now that it's last argument really is a function,
rather than a symbol designating a function name. This might introduce bugs in
the interpreter, but the algebra should run ok.

introduce configure option with-algebra-optimization to let the lisp compiler
optimize the algebra.

Introduce syntax with () for empty categories and use it. Fix aldor-interface
by removing references to *ATTRIBUTES*.

Remove attributes.

Misc cleanups.

Misc fixes.

Shoe fixes.