added processing for blend mode options argument in view, not in template [yet]
added processing for blend mode options argument in view, not in template [yet]

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