W3C HTML5 Validity

Try to make the code as possible valid.

There are 3 remaining errors

- Attribute xmlns:phraseanet not allowed here. (Required for angular to properly work with IE7)
- Bad value X-UA-Compatible for attribute http-equiv on element meta. (Can be avoided by  setting the web server to send this HTTP header 'X-UA-Compatible: IE=edge,chrome=1')
- The classid attribute on the object element is obsolete. Use the data and type attributes to invoke plugins. To set a parameter with the name classid, use the param element. (Cooliris plugin)