* When inlining a page in another one, links from the inlined page are now
expanded the same as they are when rendering the inlined page as a
standalone page. So rather than being expanded from the POV of the
inlining page, they are expanded from the POV of the inlined page.
For example, a link from blog/foo to "bar" will now link to blog/bar
if it exists. Previously this needed to be a link explicitly to
"blog/bar"; such links will also continue to work.
(This was slightly complex to do as the link still has to be constructed
relative to the inlining page.)
* Added a pagecount plugin, enabled by default.
* Support PreProcessorDirectives with no parameters, ie "[[pagecount ]]".
* Fixed/optimised backlinks code, to avoid rebuilding pages to update
backlinks when the backlinks hadn't really changed.
* Moved inline page support, rss generation etc into the inline plugin,
enabled by default.
* Added brokenlinks plugin, not enabled by default, but rather handy.
* Fix several broken links in the doc wiki.