Branching.
Added RadioButton class to handle overlaying a given path on the model.
Removed old debug code in ModelGraphic.java
Created utility class for converting GWTEdge and GWTNode collections into JS friendly structures.
Edges can now highlight.  Still a few bugs, and state is not cleared properly yet.
Rewrote better approach to highlighting edges.  Still cannot revert graph state yet.
Edges now update properly and the graph's edge state is cleared.
Merged with default.
Cleaned up code and added better visibility to highlighted edges.
Clears log and edge state upon graph refinement.
Viewing log lines for a specific node clears edge state.
Addressing code review.  Adding comments about changing the style of edges in the model.
Closed branch.