Using just the same code, importing with ```python from d3networkx import ForceDirectedGraph, EventfulGraph ``` results in the error: ```python ModuleNotFoundError: No module named 'eventful_dict' ``` My guess is this is because [this line](https://github.com/jdfreder/ipython-d3networkx/blob/master/d3networkx/eventful_graph.py#L14) should be a relative import.
