Update CHANGES for 1.3.0.

CHANGES

-babeld-1.3 (unreleased):
+8 December 2011: babeld-1.3.0
 
   * Made the route table into a sorted array, and use binary sort for
     searching for routes.  This makes most route operations O(log n), at
@@ -6,6 +6,8 @@ babeld-1.3 (unreleased):
   * Changed the update sending strategy to use buffers large enough for
     a full update.  This makes the duplicate suppression mechanism
     effective in large networks, at a small cost in memory usage.
+  * Rate-limit the reaction to wildcard requests.  This avoids an update
+    storm at boot in large networks.
   * Fixed a bug that prevented usage of the "default" keyword in
     configuration files.