* lsdb.el: Simplify X-Face rendering stuff.

* lsdb.el: Simplify X-Face rendering stuff.
(lsdb-x-face): Abolish.
(lsdb-display-small-x-face): Abolish.
(lsdb-uncompface-program): Abolish.
(lsdb-x-face-command-alist): New user option.
(lsdb-insert-x-face-function): Set default to lsdb-insert-x-face-asynchronously.
(lsdb-shell-file-name): New user option.
(lsdb-shell-command-switch): New user option.
(lsdb-print-record-hook): Rename from lsdb-display-record-hook.
(lsdb-print-record): Call lsdb-print-record-hook.
(lsdb-mode-line-buffer-identification) [XEmacs]: Simplified.
(lsdb-x-face-available-image-type): New function.
(lsdb-call-process-on-string): Abolish.
(lsdb-mirror-bits): Abolish.
(lsdb-mirror-bytes): Abolish.
(lsdb-convert-x-face-to-xbm): Abolish.
(lsdb-insert-x-face-asynchronously): New function.