adds strict rule to jshint options (except for test files). "use strict" is...

adds strict rule to jshint options (except for test files). "use strict" is added to the main jQuery closure and some "could-be-unsafe" `this` trickery in effects is silenced.

.jshintrc

@@ -9,6 +9,7 @@
     "node": true,
     "quotmark": "double",
     "smarttabs": true,
+    "strict": true,
     "trailing": true,
     "undef": true,
     "unused": true

src/.jshintrc

@@ -6,8 +6,10 @@
     "evil": true,
     "expr": true,
     "maxerr": 100,
+    "newcap": false,
     "quotmark": "double",
     "smarttabs": true,
+    "strict": true,
     "sub": true,
     "trailing": true,
     "undef": true,

src/effects.js

@@ -233,6 +233,7 @@ jQuery.Animation = jQuery.extend( Animation, {
 });
 
 function defaultPrefilter( elem, props, opts ) {
+	/*jshint validthis:true */
 	var index, prop, value, length, dataShow, tween, hooks, oldfire,
 		anim = this,
 		style = elem.style,

src/intro.js

@@ -12,3 +12,4 @@
  * Date: @DATE
  */
 (function( window, undefined ) {
+"use strict";