Added transitive closure to change-impact based on dependancy graph#191

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Commits on Aug 3, 2016

Added transitive closure to change-impact based on dependancy graph
AnnaTrost
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Commits on Aug 6, 2016

Added forwrd+backward impact flags, demo output mode
AnnaTrost
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Commits on Aug 7, 2016

Revert "Added forwrd+backward impact flags, demo output mode"
AnnaTrost
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