added whole system from ola4doc

sys/node_modules/vinyl/lib/inspectStream.js

@@ -0,0 +1,11 @@
+var isStream = require('./isStream');
+
+module.exports = function(stream) {
+  if (!isStream(stream)) return;
+
+  var streamType = stream.constructor.name;
+  // avoid StreamStream
+  if (streamType === 'Stream') streamType = '';
+
+  return '<'+streamType+'Stream>';
+};