Add a skeleton 3.1 whatsnew document.

Doc/whatsnew/3.1.rst

+****************************
+  What's New In Python 3.1  
+****************************
+
+.. XXX Add trademark info for Apple, Microsoft.
+
+:Author: No one so far
+.. :Release: |release|
+.. :Date: |today|
+
+.. $Id$
+   Rules for maintenance:
+   
+   * Anyone can add text to this document.  Do not spend very much time
+   on the wording of your changes, because your text will probably
+   get rewritten to some degree.
+   
+   * The maintainer will go through Misc/NEWS periodically and add
+   changes; it's therefore more important to add your changes to
+   Misc/NEWS than to this file.  (Note: I didn't get to this for 3.0.
+   GvR.)
+   
+   * This is not a complete list of every single change; completeness
+   is the purpose of Misc/NEWS.  Some changes I consider too small
+   or esoteric to include.  If such a change is added to the text,
+   I'll just remove it.  (This is another reason you shouldn't spend
+   too much time on writing your addition.)
+   
+   * If you want to draw your new text to the attention of the
+   maintainer, add 'XXX' to the beginning of the paragraph or
+   section.
+   
+   * It's OK to just add a fragmentary note about a change.  For
+   example: "XXX Describe the transmogrify() function added to the
+   socket module."  The maintainer will research the change and
+   write the necessary text.
+   
+   * You can comment out your additions if you like, but it's not
+   necessary (especially when a final release is some months away).
+   
+   * Credit the author of a patch or bugfix.   Just the name is
+   sufficient; the e-mail address isn't necessary.  (Due to time
+   constraints I haven't managed to do this for 3.0.  GvR.)
+   
+   * It's helpful to add the bug/patch number as a comment:
+   
+   % Patch 12345
+   XXX Describe the transmogrify() function added to the socket
+   module.
+   (Contributed by P.Y. Developer.)
+   
+   This saves the maintainer the effort of going through the SVN log
+   when researching a change.  (Again, I didn't get to this for 3.0.
+   GvR.)
+
+This article explains the new features in Python 3.1, compared to 3.0.
+
+.. Compare with previous release in 2 - 3 sentences here.
+.. add hyperlink when the documentation becomes available online.
+
+.. ======================================================================
+.. Large, PEP-level features and changes should be described here.
+.. Should there be a new section here for 3k migration?
+.. Or perhaps a more general section describing module changes/deprecation?
+.. sets module deprecated
+.. ======================================================================
+
+
+.. ======================================================================

Doc/whatsnew/index.rst

@@ -11,6 +11,7 @@ anyone wishing to stay up-to-date after a new release.
 .. toctree::
    :maxdepth: 2
 
+   3.1.rst
    3.0.rst
    2.7.rst
    2.6.rst