Added the underscore node_module.

node_modules/underscore/modules/_setup.js

@@ -0,0 +1,43 @@
+// Current version.
+export var VERSION = '1.13.6';
+
+// Establish the root object, `window` (`self`) in the browser, `global`
+// on the server, or `this` in some virtual machines. We use `self`
+// instead of `window` for `WebWorker` support.
+export var root = (typeof self == 'object' && self.self === self && self) ||
+          (typeof global == 'object' && global.global === global && global) ||
+          Function('return this')() ||
+          {};
+
+// Save bytes in the minified (but not gzipped) version:
+export var ArrayProto = Array.prototype, ObjProto = Object.prototype;
+export var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;
+
+// Create quick reference variables for speed access to core prototypes.
+export var push = ArrayProto.push,
+    slice = ArrayProto.slice,
+    toString = ObjProto.toString,
+    hasOwnProperty = ObjProto.hasOwnProperty;
+
+// Modern feature detection.
+export var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined',
+    supportsDataView = typeof DataView !== 'undefined';
+
+// All **ECMAScript 5+** native function implementations that we hope to use
+// are declared here.
+export var nativeIsArray = Array.isArray,
+    nativeKeys = Object.keys,
+    nativeCreate = Object.create,
+    nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;
+
+// Create references to these builtin functions because we override them.
+export var _isNaN = isNaN,
+    _isFinite = isFinite;
+
+// Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
+export var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
+export var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
+  'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
+
+// The largest integer that can be represented exactly.
+export var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;