Added the underscore node_module.

node_modules/underscore/amd/underscore-array-methods.js

@@ -0,0 +1,30 @@
+define(['./underscore', './each', './_setup', './_chainResult'], function (underscore, each, _setup, _chainResult) {
+
+  // Add all mutator `Array` functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = _setup.ArrayProto[name];
+    underscore.prototype[name] = function() {
+      var obj = this._wrapped;
+      if (obj != null) {
+        method.apply(obj, arguments);
+        if ((name === 'shift' || name === 'splice') && obj.length === 0) {
+          delete obj[0];
+        }
+      }
+      return _chainResult(this, obj);
+    };
+  });
+
+  // Add all accessor `Array` functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
+    var method = _setup.ArrayProto[name];
+    underscore.prototype[name] = function() {
+      var obj = this._wrapped;
+      if (obj != null) obj = method.apply(obj, arguments);
+      return _chainResult(this, obj);
+    };
+  });
+
+  return underscore;
+
+});