Fix died when failed to parse result as JSON

aws s3 put-object returns not XML but null HTTP body response, so failed to
parse as JSON.
Add some methods for aws-cli/0.12.0
Checking in changes prior to tagging of version 0.06.

Changelog diff is:

diff --git a/Changes b/Changes
index 8879246..2754630 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for AWS::CLIWrapper

+0.06  2013-06-12
+  * Add some methods for aws-cli/0.12.0
+  * Fix died when failed to parse result as JSON (aws s3)
+
 0.05  2013-05-01
   * Add some methods for latest awscli (0.9.2)