Added history_max_len.
Added test case for history_max_len
Checking in changes prior to tagging of version 0.03.

Changelog diff is:

diff --git a/Changes b/Changes
index 087427f..12413b0 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Caroline

 {{$NEXT}}

+0.03 2013-08-09T11:52:14Z
+
+    - Added history_max_len
+
 0.02 2013-08-09T11:23:45Z

     - Use Term::ReadKey to support MSWin32