Adding the design jam pages in french and english

This line doesn't contain an `<a>` element.
```html
<li><span class="list-group-item item-selected"><span class="glyphicon glyphicon-info-sign glyth-yellow"></span>   About</span></li>
```
should be replaced by
```html
<li><a href="about-en.html" class="list-group-item"><span class="glyphicon glyphicon-info-sign glyth-yellow"></span>   About</a></li>
```

Same for the French, except pointing to `about-fr.html`.