added marker on center for centering on ramon, fixed bug in synaptogram launcher
added marker on center for centering on ramon, fixed bug in synaptogram launcher

neurodata/NeuroDataViz,neurodata/NeuroDataViz,neurodata/NeuroDataViz,openconnectome/NeuroDataViz,openconnectome/NeuroDataViz,openconnectome/NeuroDataViz