updating CHANGELOG

CHANGELOG

@@ -1,6 +1,17 @@
 1.1.1 (???, 2012)
+ ## Overview of this release:
+  * New output plugins: juggernaut, metricscatcher, nagios_ncsa, 
+  * New filter plugins: zeromq
+  * Fixes for gelf output
   * Fixes for elasticsearch_river output
 
+ ## IMPORTANT CHANGES FOR UPGRADES FROM 1.1.0
+  - zeromq input and output rewritten
+      The previous zeromq support was an MVP. It has now been rewritten into
+      something more flexible. The configuration options have changed entirely.
+      While this is still listed as `experimental`, we don't predict any more
+      configuration syntax changes. The next release will bump this to beta.
+
 1.1.0 (January 30, 2012)
   ## Overview of this release:
     * New input plugins: zeromq, gelf