make force-directed graph gravity, link distance, and charge configurable
tweak graph settings to display profile egographs better
utility method to filter nx graph by minimum degree [#70468362]
add minimum degree option filter when generating ego graphs [#70468362]
update belfast group json view with option to generate 2-degree graph data [#70468362]
add configurable degree-toggle option to d3 network graph [#70468362]
enable toggle between 1 and 2 degree egograph for first belfast group network graph [#70468362]