Dump unused data (it can be regenerated).
Move the UCW-based code to a new system ("dialogues-ucw").
Dump the TODO.
Emacs backup files for everything.
Forgot about start-ucw.lisp.
We don't use a modified CL-WHO anymore.
We don't use any submodules anymore.
Dump unused csp.lisp.
Dump unused felscher-examples.lisp.
Move the (one) signature to signature.lisp.
Don't try to load the (recently deleted) signature-examples.lisp.
start-ucw.lisp isn't used (it's not even my own).
Incorporate the about text in about.lisp into ucw-site.lisp.
Simple Makefile for the ucw module.
Delete some unused make variables.

They're unused because we now use a wildcard to characterize Emacs backup files.
Dump stubs for Felscher's transformations.
Dump unused figure.lisp.
Dump unused sequent.lisp.
Use Alexandria's SET-EQUAL rather than my own utility.
Delete end-of-line whitespace.