serve: Refactoring and fixes to be able to serve taxonomy pages. * Page sources' `findPagePath` is renamed to `findPageFactory`, so that it also returns source metadata. * Page refs now store possible hits more properly, and use the previous point to also store metadata. As a result, they can also return a proper factory. * Implement `findPageFactory` correctly in all built-in sources. * When the Chef server matches a taxonomy page, get the source metadata from the page ref in order to make a more proper page. * Make the `getRoute(s)` functions explicitely say if they want taxonomy routes or not.

CHANGELOG
=========

This is the changelog for PieCrust.

The first section deals with the latest changes in the development branch
(``default`` in Mercurial, ``master`` in Git).

The second section deals with changes in the stable branch (``stable`` in
Mercurial, ``git-stable`` in Git), but those changes are also included in the
development branch (the development branch is ahead of the stable branch).


Fresh changes
-------------

*None... this stuff is still being prepared...*

Frozen changes
--------------

*None... this stuff is still being prepared...*