Add audit trail, commit record

[GoogleCodeExporter]

In 
http://groups.google.com/group/test-analytics-discuss/browse_thread/thread/f2b19
0f9a74949f5 I said:

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It'd be nice to be able to justify risk decisions, perhaps like a 
commit message when you Save. 
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Jim said:

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Audit trail & something like this would be a great idea -- feel free to file  
this as a feature request as well.
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Original issue reported on code.google.com by [email protected] on 25 Oct 2011 at 8:37