Changed various build-technical details.

Switched to pure Maven style build. 'mvn build' now creates a valid Vert.x
module that can directly be used in Vert.x 2.1.

Enabled Neo4J web administration interface. This will be controlled by the
'mode' setting in the json configuration file (neo4vertx.json).

Renamed the module to neo4vertx, origin org.openpcf, added license details.

Added javadoc comments to all classes and interfaces. Added author where
we changed things from upstream.
New files missed in previous commit.

Previous commit detailed all changes, this one adds the new files.