* Pass a "destpage" parameter to preprocessor and pagetemplate hooks.
This will be the page that a source page will be part of, which is
different than the source page for inlined pages.
* Audited all plugins to endure they pass page, destpage to htmllink
appropriatly. This means inlining of various plugins will not work
properly, with correct links generated.
* 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.)
joey