Fixed problem building single-language versions of the client

Detect brain-dead version of sed so we abort rather than create buggy pages

Fixed kom-first-line-face in inverse color scheme
kom-extended-status-information is now nil by default.

	and y-instring modified to make j-or-n-p behave more like
	y-or-n-p.

of occasional hanging.

Updated web pages so they sort of work in Netscape 4

Fixed bug where prefix arg to kom-change-language didn't do the right thing

Fixed some issues kz pointed out in preparation for release.