Merge pull request #1013 from bripkens/lint

Fix use strict warnings

src/core/ReactComponentEnvironment.js

@@ -16,6 +16,8 @@
  * @providesModule ReactComponentEnvironment
  */
 
+"use strict";
+
 var ReactComponentBrowserEnvironment =
   require('ReactComponentBrowserEnvironment');
 

src/core/ReactMultiChildUpdateTypes.js

@@ -16,6 +16,8 @@
  * @providesModule ReactMultiChildUpdateTypes
  */
 
+"use strict";
+
 var keyMirror = require('keyMirror');
 
 /**

src/core/__tests__/ReactMultiChild-test.js

@@ -17,6 +17,8 @@
  * @emails react-core
  */
 
+"use strict";
+
 var mocks = require('mocks');
 
 describe('ReactMultiChild', function() {

src/dom/__tests__/Danger-test.js

@@ -16,9 +16,10 @@
  * @jsx React.DOM
  * @emails react-core
  */
-
 /*jslint evil: true */
 
+"use strict";
+
 var React = require('React');
 
 describe('Danger', function() {