install gulp to process code

node_modules/rechoir/lib/register.js

@@ -0,0 +1,15 @@
+var resolve = require('resolve');
+
+module.exports = function (cwd, moduleName, register) {
+  var result;
+  try {
+    var modulePath = resolve.sync(moduleName, { basedir: cwd });
+    result = require(modulePath);
+    if (typeof register === 'function') {
+      register(result);
+    }
+  } catch (e) {
+    result = e;
+  }
+  return result;
+};