Node shapes from images added by [Ederrod](https://github.com/Ederrod) and merged to the master branch.
0.0.28
Added node removed and edge removed events.
0.0.27
Added edge event. Now adding edge results in two events:
- The first event is new_edge_beingAdded_callback which asks the application to validate the edge adding. - The second event is new_edge_created_callback whicj informs the application that the edge is created
0.0.26
Edge selection when more than a single edge is used between two nodes
0.0.25
Added the possibility to add multiple edges between the same nodes two nodes The cycles are still forbidden as they break the Dot engine