C-S and C-R search history backwards and forwards.

  Also kludgy support for recursive editing.

  (So is C-Backspace, for now.)

  M-D is delete-word-forwards (new),

  M-L is downcase-word (previously M-D)

* <blush>Type Julian's name correctly</blush>

* Copyright updates: add 2004 and Julian.
* Make the dependency on Osicat 0.4.0 explicit. Yuk.
  Asdf/asdf-install should grow version management...

 * Added homedir (~ and ~user) completion.  Requires latest osicat.
 * Added preliminary close-all-sexps, bound to C-O.