Correct rules for tree model - poisson rootbiased initialization present, innovation happens within population.  Need to work on the "add" and "loss" aspect...
Better rule - but everything is still different - agents don't converge in culture.  Need to reinstate some kind of copy/replacement.
Rule seems to be in a good state.  The model will converge, for very small loss and innovation rates (e.g., 0.0001 or 0.00005), pegs at 100% active connections otherwise.  Moving on to capture trait structure samples.
axelrod-ct-16 Save graph of traits to the database in GEXF format
Basic updates to setup.py, and addition of a nauty module which outputs a graph into a string in Dreadnaught format, for calculation of the automorphism group and orbits of the graph