Tweaking for sonatype.
Add gpg signing.
Xnum improvements.
Merge branch 'develop' into feature/CentralPublishing
Remove configuration module.
First pass at owner module.

Guice does not work, that I can tell, with generic providers.  For now
require each owner config class to have it's own module.
Javadoc for owner module.
Merge branch 'feature/Owner' into develop
Merge branch 'develop' into feature/CentralPublishing
Mixins are tasty.
Merge branch 'develop' into feature/CentralPublishing
Include overrides for owner module.

For example, commandline options might be passed in as overrides; they take
precedence over environment or system properties.
Merge branch 'develop' into feature/CentralPublishing
Merge branch 'feature/Javadoc' into develop
Merge branch 'develop' into feature/CentralPublishing
Improve github docs.
TODO for gpg.
Merge branch 'feature/CentralPublishing' into develop