Rewrite `lend-id.html` template.

Make template use sectioning elements properly. For example, use a blockquote to
contain comments by users. Also use a template to present information about a
lend, rather than a definition list.
Style `lend-id.html` template.

Create stylesheet `lend-id.css` and link to it from the `lend-id.html` template.
Apply table styles more precisely.

Push table styles from base.css to object.css. Include object.css only where
needed. This is especially helpful in the `lend-id.html` page, where rules were
conflicting.
Tweak styles and content throughout site.

Move lend-id.css to object-id.css and link to it from all three *-id.html
templates. Tweak wording and contents in all three *-id.html templates. Move a
rule from the object-id.css template to the base.css template.