Onclick node data retrieval

[MkuuWaUjinga]

Hi there, I added an onClick-data-retrieval-feature for node objects. You can define an onClickHandler as an optional Neo4jGraphRenderer prop. Whenever a node is clicked, the onClickHandler will return node data e.g. the properties of the node. This feature lets information flow back to the system using the Neo4jGraphRenderer and will therefore create more usecases for this project e.g. a user driven query refinement or simply a visualization of the nodes properties.

[edwinestrada]

+1