first pass at ticket #197: summarize sliver status in the overall return message
first pass at ticket #197: summarize sliver status in the overall return message

GENI-NSF/gram,GENI-NSF/gram,GENI-NSF/gram,plantigrade/geni-tools,tcmitchell/geni-tools,ahelsing/geni-tools,plantigrade/geni-tools,ahelsing/geni-tools,tcmitchell/geni-tools