First steps for Neo4j driver

 - Add cq as a linked in dependency.
 - Add hkp_neo.conf configuration file.
 - Add small note in readme about how to run with Neo.
 - Disable all schema creation.
 - The server starts and shows UI.
 - Expose the Neo4J and Hockeypuck servers in Vagrant.
 - Issue Cypher queries for key insertion.
 - Minimal graph constraints.
 - Database time values are wrapped in `WrappedTime`.
 - Database binary values are wrapped in `WrappedByteArray`.
Use Disable() and Exit() instead of Stop()

The `github.com/cmars/conflux` package has a `Stop()` function that
calls into `Disable()`, and then cleans up everything and stops the
gossip server. However, this function is buggy.

Since we just want to exit anyway, change this into a `Disable()`
followed by an `Exit()`. Memory leak, gossip server leak, but it seems
to function.