Release 0.2.3
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General Changes
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* Added ``session_uuid`` built-in parameter.
* Added ``run`` command deletes digdag.status directory if workflow finishes successfully.
* :error task gets all children's store parameters.
* Fixed TaskControl.addTasksExceptingRootTask not to submit a root task twice.
* Fixed TaskResult to be built with default values.


Release Date
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2016-02-22

Contributors
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* Sadayuki Furuhashi