Export a standard graph format

[wyattis]

We should export a standard graph format from breadboard.

This could be broken into two types of graphs:

1. Static graphs as a snapshot of the game. There are many static graph formats out there and this is probably significantly easier than supporting the dynamic graphs.
2. Export a dynamic graph representing the state of the graph throughout the entire game. GEFX seems like the best candidate for output of dynamic graphs based on this list

GEFX supports both static and dynamic formats and there is a java library with partial support already. So it might be the best candidate for both.