html5 heade + cleaning of the manager files and the theme(except tools like ImageEditor and more)

html 5 doctyle
removed type="text/javascript"
removed language="javascript"
removed type="text/css"
removed <![CDATA[
html5 head for install files and some clean up
html 5 head for resmanager and some clean up
Merge pull request #217 from Cipa/develop

html 5 doctype and some cleanup
Revert HTML5 cleaning for manager/includes/document.parser.class.inc.php