It's a bit awkward, but to generate a page needed to update
BoostPages_Page, which wasn't always appropriate. So now generate pages
just using the data from the quickbook source, combined with the state
data.
Was updating it every time an item was updated, this was unnecessarily
slow. Typically, only a very small number of items are updated per run,
so it shouldn't make much of a difference, but a lot faster if many
items are updated.
Previously was using the quickbook file's pub_date, By using the date
the release script was run on, can release without updating the
quickbook file. So the release manger won't need to have quickbook
installed. At least in theory!
- Both are now stored as strings.
- Unpublished articles have a null pub_date.
- last_modified is now always the last modified date,
before it was the pub_date once published.
