I am also fan of Neo4J’s web interface and I agree with JongWook's
opinion, think about the UI from the scratch.
I thought simply visualize graph structure could be done with simple
javascript work(maybe d3.js or something) since s2graph query has
"returnTree" feature that return entire tree that
When user query is provided, we are build RPC request(GetRequest, Scanner)
to fetch list of KeyValue from storage.
For query, I think mostly we only need bytes for rowKey(GetRequest), but
currently building rowKey, qualifier, value on Serializable is not
separated so we have to serialize qualifier
