Remove neo4j panel
Removed neo4j panel dependency
Added graph module
Refactor functions
Refactor the whole insert/edit process to use neo4j rest api
Remove filecache since it doesn't support caching Node instance from Neo4jRestClient
Only cache node id for model resolution
Updated test to fit with the new patching method
Used error-proof empty value
Added field cheking before update #564
Added fields debug for #564
Implemented directional relationships
Merge branch 'feature/rest-driven-patch' into develop