implemented GrowthForecast::Aggregator::Callback
Checking in changes prior to tagging of version 0.1.0.

Changelog diff is:

diff --git a/Changes b/Changes
index 76ad375..304d842 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for Perl extension GrowthForecast::Aggregator::Declare

+0.1.0 2013-02-28T09:02:12
+
+    - Added GrowthForecast::Aggregator::Callback
+
 0.0.2 2013-02-28T08:49:10

     - docs