Update Changes
Checking in changes prior to tagging of version 1.22.

Changelog diff is:

diff --git a/Changes b/Changes
index ab76c7f..f0f52c6 100644
--- a/Changes
+++ b/Changes
@@ -18,6 +18,8 @@ https://developers.facebook.com/bugs/597779113651383/
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 {{$NEXT}}
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+1.22 2014-05-18T08:37:32Z
     - Fixed a bug that it croaks when 'expires' is not returned from
       /oauth/access_token