Update changelog for release.

CHANGELOG.txt

 // $Id$
 
-Feeds 6.x 1.0 xxxxx xx, xxxx-xx-xx
+Feeds 6.x 1.0 Alpha 12, 2010-02-23
 ----------------------------------
 
 - alex_b: Add PubSubHubbub support.
@@ -8,9 +8,8 @@ Feeds 6.x 1.0 xxxxx xx, xxxx-xx-xx
   implementers of a source being saved or deleted.
 - #717168 nicholasThompson: Fix feeds UI JS doesn't select labels correctly.
 - #708228 Scott Reynolds, alex_b: Break FeedsImportBatch into separate classes.
-  NOTE: FeedsFetcher implementations cannot use FeedsImportBatch directly
-  anymore but most provide their own implementation of FeedsImportBatch. See
-  FeedsHTTPFetcher.inc for an example.
+  NOTE: Review your FeedsFetcher implementation for changes in the
+  FeedsImportBatch class, small adjustments may be necessary.
 - alex_b: Support mapping to OpenID, using OpenID as a unique mapping target.
 - alex_b: Handle exceptions outside of Importer/Source facade methods.
 - #600584 alex_b: Use Batch API.