Moved margins to contentBox

Instead of adding it to all content inside the content box
Fixed page access error and some small html errors

If page edit filter were used no images could be uploaded by the user
(and some other errors).
Also fixes som html errors like <img> with closing tag or /> that
should not exist.
Add email to Boardleader
More cleanup for better html validation
Left/Right margin changes and backend url
Member pages protected with password

Added page template that indicate that the page is protected by a
password. There is only one password for the whole site.
Child page to group template

Added a template that shall be used for child pages to a group.
Roles bug fixes

Last fix prevented users to edit pages that other user had created.
Even admin couldn't edit pages.
Merge pull request #23 from LeafCoders/Issue-#22

Issue #22