Add CircleIO config.

Change-Id: Iabf095a5fffe2c64d35b614b4242315206be21f1
Add test output as an artifact
Merge pull request #6 from csmith/master

Attempt #3 at a CircleIO config.
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Change-Id: Id4f392b9e646eed8b90357974523772ae1b2b72e
Merge pull request #2 from greboid/master

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Support for publishing builds from gradle.