Added configuration parameter for a simulation cutoff time, at which point a simulation which has not converged is sampled and then terminated.  Cleaned up the configuration class to have parameter labels and inherit the parameter labels of the base class, unit test for tree structured configuration is clean.  Updated parallel runner to have appropriate maxtime termination of simulations.
The parallel version of treestructured is correct and works, and suppresses saving of trait trees in GraphML.  The single run version of treestructured takes a parameter --savetraitgraphs, which saves the trait graphs to the database for that specific run.  This is pretty much ready for doing the actual simulation runs.
Updated configuration to add _save_graphs to the parameters to ignore for pandoc/latex.