Discovery improvements

• Service types can now be configured, and specially labeled/annotated. (See documentation on core.discoveryService.* and core.service.*). #18
• User documentation includes different flags for command line tools that are more common in user environments #17

First Post-Migration Release

We are migrating from the old public helm chart repository to this one. This is the first release since that migration, and includes a number of valuable upgrades and fixes.

• Greatly expanded documentation and a new user guide
• Architectural documentation describing the basics of how the chart works
• External exposure for bolt clients outside of Kubernetes is now possible, with instructions included
• Usage of Neo4j's K8S discovery type for the cluster, which should improve stability and ease certain cluster operations
• Support for configuring metrics (prometheus, graphite, csv)
• Support for using neo4j-admin memrec to automatically configure memory
• Explicit memory configuration is now possible
• New and improved CI chain with much better integration tests