Made a fairly significant change to the publisher: the publish() method

now returns the logical request that was actually used to complete the 
request. This is necessary, since the passed in request might be 
overridden when a retry of the request occurs.

Also, the request.close() method does not unlink the response object from 
the request anymore. This allows one to reference the response from the 
request returned from the publish() method.

This finally corrects the outstanding WSGI issues. All unit and functional 
tests on this branch pass now.

methodnotallowed.txt

@@ -10,7 +10,6 @@ view,  HTTP 405 Method Not Allowed response is returned:
   HTTP/1.1 405 Method Not Allowed
   Allow: DELETE, MKCOL, OPTIONS, PROPFIND, PROPPATCH, PUT
   Content-Length: 18
-  Content-Type: text/plain
   <BLANKLINE>
   Method Not Allowed