Update CHANGELOG with stats changes

CHANGELOG.rst

@@ -3,10 +3,19 @@
 CHANGELOG
 =========
 
+0.4
+---
+
+* ``parasolr.query.SolrQuery`` additional support for stats:
+
+  * New method ``stats`` to enable stats for a set of field names.
+  * New method ``get_stats` to return the entire stats reponse.
+
+
 0.3
 ---
 
-* ``parasolr.query.SolrQuerySet`` additional support for faceting: 
+* ``parasolr.query.SolrQuerySet`` additional support for faceting:
 
   * New method ``facet_field`` for more fine-grained facet feature
     control for a single facet field
@@ -15,13 +24,13 @@ CHANGELOG
     ``facet_field`` method and ``exclude`` option on ``filter``
   * ``get_facets`` now returns the entire facet response, including
     facet fields, range facets, etc.
-      
+
 * ``SolrQuerySet.filter()`` method now supports the following advanced lookups:
 
   * **in**: filter on a list of values
   * **exists**: filter on empty or not-empty
   * **range**: filter on a numeric range
-    
+
 * New method ``SolrQuerySet.also()`` that functions just like ``only()``
   except it adds instead of replacing field limit options.
 * New ``parasolr.query.AliasedSolrQuerySet`` supports