Checking in changes prior to tagging of version 3.11.

Changelog diff is:

diff --git a/Changes b/Changes
index 75ac207..e41fbc2 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,12 @@ Revision history for Perl extension ObjectDB

 {{$NEXT}}

+3.11 2014-12-12T22:44:08Z
+
+    [FIXES]
+    - explicitly return undef on get_column
+    - fix transaction error handling
+
 3.10 2014-04-28T09:59:37Z

     [FEATURES]