use directories for structure

node_modules/vinyl/lib/inspect-stream.js

@@ -0,0 +1,13 @@
+'use strict';
+
+function inspectStream(stream) {
+  var streamType = stream.constructor.name;
+  // Avoid StreamStream
+  if (streamType === 'Stream') {
+    streamType = '';
+  }
+
+  return '<' + streamType + 'Stream>';
+}
+
+module.exports = inspectStream;

node_modules/vinyl/lib/is-stream.js

@@ -0,0 +1,15 @@
+'use strict';
+
+function isStream(stream) {
+  if (!stream) {
+    return false;
+  }
+
+  if (typeof stream.pipe !== 'function') {
+    return false;
+  }
+
+  return true;
+}
+
+module.exports = isStream;

node_modules/vinyl/lib/normalize.js

@@ -0,0 +1,9 @@
+'use strict';
+
+var path = require('path');
+
+function normalize(str) {
+  return str === '' ? str : path.normalize(str);
+}
+
+module.exports = normalize;