Add /site/user/profile Developer view for editing arbitrary User entities. Update /user/profile edit() view to fix TODO about updating the URL when a POST of the form changes the link_name of the User. Add a Create New User link to the base.html sidebar mock-up.

This is an optional add-on app, flatpages.

For full documentation, see either of these:

    * The file docs/flatpages.txt in the Django distribution
    * http://www.djangoproject.com/documentation/flatpages/ on the Web

Both have identical content.