NewFeatures: Chronological entries

Directories can now have default view types associated with them, by the simple yet sleazy method of touching a file in them called .flag.prefview:<viewname>.

This lets us auto-set a directory to default to a blogdir view.

The page tools now autogenerate a list of 'See As <whatever>' links for alternate directory formats.

This required some innards magic to distinguish a normal view being explicitly specified from no view being specified and us just defaulting to a normal view.

Directories can now be displayed as a 'blogdir', which treats the files in the directory as if they were blog entries: they are sorted by modification time, most recent first, and then they are all displayed inline with a title.

A chunk of this behavior is controlled by templates and new renderers. 'blogdir' is a new view, only valid for directories, which uses blogdir.tmpl. The blog::blogdir renderer does the direct expansion, running each file through the template blog/blogentry.tmpl.

There are also new renderers for the new blog-like time format and for showing the owner of a file. (Currently the Unix and/or RCS owner.)

This is ... how shall we say it ... not hugely scalable over the long run in terms of time structure and number of entries.