Hidden GraphGems revisited: the 2.2 Meta-graph

The Neo4j 2.2 Meta-graph query has been improved to better visualize relationships in the browser. Originally, the query created nodes for every relationship and used those nodes to represent both node-labels and relationship-types, which was confusing. However, with the new query, a separate "name" property is added to the `META_RELATIONSHIP` relationship type, allowing users to select this property in the browser to create a more accurate visualization of relationships. This change enables a cleaner representation of nodes as labels and relationships as types, making it easier to understand complex connections between data entities.