use directories for structure

node_modules/is-unc-path/index.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var regex = require('unc-path-regex')();
+
+module.exports = function(filepath) {
+  if (typeof filepath !== 'string') {
+    throw new TypeError('expected a string');
+  }
+  return regex.test(filepath);
+};