wp-app.php Patch

[rubys]

This path was written by Pete Lacey, and QA'ed by Sam Ruby. It does the following:

1. Removes use_quesrystring code
2. Fixes the regex for parsing the URI path
3. Fixes rel="self" links for pages > 1
4. Makes last page of paginated feed contain only entries not seen on previous page
5. Implements a content sniffing algorithm for setting type and content for Atom entry title, content, and summary elements

It also factors out the redundant code for creating an entry document and some other code cleanup.

Results of running Tim Bray's APE can be found here:

​http://intertwingly.net/stories/2007/09/ape/report.html

Results of running Joe Gregorio's apptestsuite can be found here:

​http://intertwingly.net/stories/2007/09/ape/apptestsuite.out

[rubys]

Patch written by Pete Lacey

[ryan]

(In [6004]) AtomPub fixes from Pete Lacey. fixes #4887