Populating Chicago data was broken due to missing SRID - fixed by switching to a different SRID that is identical.
Added KDE model for deterministic nn.  Can't make this work though.
Added weighted_kde properties to SeppStochastic for both trigger and bg.  These return the FULL weighted KDE, as in the deterministic model.
TODO: can we actually just point the set_kdes command to this in the deterministic model??
Started adding commands to test convergence... Currently they are to be found in SEPP models, but may want to move to implementation module or similar?  Also started adding plotting.
Added similar to runner, am halfway through shifting them TODO: finish moving them.
TODO: finish copying to plotting as well.