We now have two clear and separate login approaches:
login/ajax
login/html
Choose the one that's appropriate. Totally simplified the maintenance
page to be separate from the theme and dead simple, and use login/html
approach there. Totally simplified the top level login
(login_page.html.php) to just be a login page, not the rest of the
chrome on the page and use the login/ajax approach there.
Don't use access::required in albums and then catch the exception,
instead use access::can and check the return code.
Improve the text for maintenance mode.
