ikeough/Dynamo — pull request #874 by Benglin (2013-12-02 05:18:10+00:00)
Title: Implement OpenFileCommand and RunCancelCommand

Background
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This submission implements two new recordable commands:

* RunCancelCommand (happens when Run or Cancel button is clicked)
* OpenFileCommand (happens when user opens a dyn/dyf file)

Unit testing
============
Two new unit test cases are added to exercise the new codes:

* TestRunCancelCommand
* TestCreateNodesAndRunExpression