add json2.js to support ie67

1. download [douglas's json2.js](https://github.com/douglascrockford/JSON-js/blob/master/json2.js) and save at queen/static
2. modify queen/static/index.html to add json2.js script link 
3. by the way, i use eclipse, so, add '.project' to .gitignore

maybe you don't need to concern with ie67, but many other projects need to take care about them, i indeed hope you can accept this request