Fix movement commands in emchat-log-mode.

Fix movement commands in emchat-log-mode.

There was a problem with a regexp which was preventing
#'emchat-log-previous and #'emchat-log-next finding anything other than
the beginning or end of the log file.  This patch fixes that.

Then I got carried away and updated all the copyright notices and cleaned
up all the spurious whitepace .

	* emchat-log.el (emchat-log-entry-re): Drop the bol char from it
	and replace emchat-log-outline-regexp with this.

	* emchat-log.el (emchat-log-mode): Use `emchat-log-entry-re'
	instead of `emchat-log-outline-regexp'.

	* emchat-log.el (emchat-log): Allow for the change in
	`emchat-log-entry-re'.

	* emchat-log.el (emchat-log-mark): Use `emchat-log-entry-re'
	instead of `emchat-log-outline-regexp'.

	* *.el: Update copyright notices and clean up whitespace.

	* Makefile: Ditto.

Signed-off-by: Steve Youngs <steve@emchat.org>