Node type not quite working as expected

[ericcarino]

I'm having two separate issues w/ node types:

1. Specifying a default type by adding the following tag does not appear to work for me. <NodeShapes default="star"/> I would expect when a type isn't specified for the node on the graph, it would default to star?
2. If I specify the node type in the graph (like below), I only see the updated node shape on hover. On non-hover, it goes back to a circle.
   { id: "n1", label: "Alice", type: "star" }