Remove spurious * in docstrings.

Remove spurious * in docstrings.
Put its autoloads into tpu-edt.el rather than loaddefs.el.
(tpu-cursor-free-mode): Rename from tpu-cursor-free.
Make into a proper minor-mode.
(tpu-backward-char, tpu-next-line, tpu-previous-line)
(tpu-next-end-of-line, tpu-current-end-of-line): Use new name.
(tpu-trim-line-ends-if-needed): Rename from tpu-before-save-hook.
(tpu-set-cursor-free, tpu-set-cursor-bound):
Delegate to tpu-cursor-free-mode.
(tpu-next-line, tpu-previous-line, tpu-forward-line)
(tpu-backward-line, tpu-scroll-window-down, tpu-scroll-window-up):
Use line-move or forward-line instead of next-line-internal.