Add @AutoService for generating META-INF/services configuration files.
Feedback from cgruber.
Missed a file in the last commit.
Merge pull request #18 from gk5885/auto-service

Add @AutoService for generating META-INF/services configuration files.
Add plugin configuration required for ultimate release to maven central repository (javadoc and source jars created, and gpg signing.)
Merge pull request #20 from cgruber/releasetesting

Add plugin configuration required for ultimate release to maven central ...
Fix bad link to Auto-Factory.