Added script file to run SEPP on Chicago at different scales.  TODO: extend this to VALIDATION
Modified validation code so that SEPP now attempts validation with full, full_static, bg, trigger.
Added new Roc class with weights rather than cutoff.  Added definition for new validation class, but still need TODO the coding.
Added trigger marginals plotting routine and better heatmap plotting.  TODO: add OSM features to the plotting calls.