Fixed numerous XHTML problems that caused validation errors and warnings. Link elements for Atom and RSS feeds had no end tag. <div> block element inside <a> in-line element isn't right and caused rendering problems on Safari. Spurious </div> tag in search forms. Branch entry missing closing </a> tag.

patchbomb: attachment options changed '-a/--attach' send patches as attachment '-i/--inline' sends patches as inline attachment (old behavior of -a/--attach)

patchbomb: consistently use opts.get

patchbomb: fix more line continuations (coding style)