JS API: Expose protocol independent ID of device
JS API: Expose protocol independent ID of device

Signed-off-by: Sudarsana Nagineni <sudarsana.nagineni@intel.com>

Closes gh-162

gabrielschulhof/iotivity-node,otcshare/iotivity-node,otcshare/iotivity-node,gabrielschulhof/iotivity-node,otcshare/iotivity-node,gabrielschulhof/iotivity-node