Update docs
Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index e16207d..bf3f9ac 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Algorithm-AdaGrad

 {{$NEXT}}

+0.02 2014-08-05T03:35:50Z
+
+    - Update documents
+
 0.01_01 2014-08-04T18:13:24Z

     - original version