Fix to get window correctly in iife.

browser-entry.js

@@ -1,4 +1,5 @@
 import should from './es6/should';
+import root from 'root';
 
 var defaultProto = Object.prototype;
 var defaultProperty = 'should';
@@ -10,3 +11,17 @@ try {
 } catch (e) {
   //ignore errors
 }
+
+if (typeof define === 'function' && define.amd) {
+  define([], function() { return should });
+} else if (typeof module === 'object' && module.exports) {
+  module.exports = should;
+} else {
+  root.Should = should;
+
+  Object.defineProperty(root, 'should', {
+    enumerable: false,
+    configurable: true,
+    value: should
+  });
+}

package.json

@@ -23,7 +23,7 @@
     "eslint": "^2.4.0",
     "mocha": "latest",
     "mocha-better-spec-reporter": "latest",
-    "rollup": "^0.26.3",
+    "rollup": "^0.29.0",
     "rollup-plugin-node-resolve": "^1.5.0",
     "zuul": "latest"
   },

rollup.config.js

@@ -14,31 +14,19 @@ const banner = `/*!
  */
 `;
 
-const outro = `
-if (typeof define === 'function' && define.amd) {
-  define([], function() { return should });
-} else if (typeof module === 'object' && module.exports) {
-  module.exports = should;
-} else {
-  this.Should = should;
-
-  Object.defineProperty(this, 'should', {
-    enumerable: false,
-    configurable: true,
-    value: should
-  });
-}`;
-
 module.exports = {
   entry: 'browser-entry.js',
   banner,
-  outro,
   format: 'iife',
   plugins: [
     nodeResolve({
       jsnext: true,
       main: true,
       preferBuiltins: false
     })
-  ]
+  ],
+  external: ['root'],
+  globals: {
+    root: 'this'
+  }
 };