fix(docs): added note about using JSON3 as a polyfill for IE7

Author: btford

docs/content/guide/ie.ngdoc

@@ -12,12 +12,12 @@ on IE v8.0 or earlier.
 
 To make your angular application work on IE please make sure that:
 
-  1.  You provide JSON.stringify (via
-  [Douglas Crockford's JSON2 library](https://github.com/douglascrockford/JSON-js), or similar)
-  if the browser does not have it. IE7 and earlier will need this.
+  1. You polyfill JSON.stringify if necessary (IE7 will need this). You can use
+     [JSON2](https://github.com/douglascrockford/JSON-js) or
+     [JSON3](http://bestiejs.github.com/json3/) polyfills for this.
 
-  2. you **do not** use custom element tags such as `<ng:view>` (use the attribute version `<div
-  ng-view>` instead), or
+  2. you **do not** use custom element tags such as `<ng:view>` (use the attribute version
+     `<div ng-view>` instead), or
 
   3. if you **do use** custom element tags, then you must take these steps to make IE happy:
 
@@ -29,7 +29,7 @@ To make your angular application work on IE please make sure that:
           document.createElement('ng-include');
           document.createElement('ng-pluralize');
           document.createElement('ng-view');
-          
+
           // Optionally these for CSS
           document.createElement('ng:include');
           document.createElement('ng:pluralize');
@@ -71,7 +71,7 @@ categories, and each category has its own fix.
 
 ## The Good News
 
-The good news is that these restrictions only apply to element tag names, and not to element 
+The good news is that these restrictions only apply to element tag names, and not to element
 attribute names. So this requires no special handling in IE: `<div my-tag your:tag></div>`.
 
 
@@ -137,7 +137,7 @@ The to make CSS selector work with custom elements the custom element name must
         <script>
           // needed to make ng-include parse properly
           document.createElement('ng-include');
-          
+
           // needed to enable CSS reference
           document.createElement('ng:view');
         </script>