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.
Merge pull request #4 from csmith/publish-from-gradle

Support for publishing builds from gradle.
Remove submodules.
Tidy up build file after submodule removal.

- Remove allprojects block, as there's now only 1 project.
- Reduce cache time for dynamic artifacts in line with plugins.