New title for Web page and some other tweaks

New title for Web page and some other tweaks

The new title is a fade from a (manipulated) photo of the word
"Bedstead" displayed by my Beeb on a CRT monitor into the title text in
Bedstead Extended.  The other visible tweak is to increase the left
margin so that the headings have some clearance from the left edge of
the window.  At the same time, I've set the other margins explicitly to
the 8px that Firefox and Chromium use by default.