Many changes (most discussed discussed on bacula-docs) list.

Some of the changes include: removing extra highlighting; use
sections instead of lists for some paragraphs; few grammar or
punctuation fixes.

This also adds some TODO comments. Please search for "TODO" in this
tex file and help answer or clean up that part.

Note: we will work on making a style guide to document how we should
consistently do highlighting/bolding/emphasis/italics for the manual.