neo4j/graph: Add node removal methods.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Add optimization methods.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Add Neo4j as a storage mechanism.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Add a sequential identification scheme.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Optimize some services of `SequentialNodeCollection`.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Implement optimization services of `SequentialNodeCollection`.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Add a JSON storage mechanism.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>
neo4j/graph: Enlarge in advance when loading from JSON.

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>