Add cache booster

Overwrite all "link" and "script" tag by adding Date.now() at the end of "href" and "src" attributes, respectively

This
```html
<link  href='style.css' rel='stylesheet'>
<script src="jquery.js?v=1.10.2"></script>
<script src="script.js"></script>
```
Will overwrite by this
```html
<link  href='style.css?1378467417809' rel='stylesheet'>
<script src="jquery.js?v=1.10.2&1378467417809"></script>
<script src="script.js?1378467417809"></script>
```