Make $website variable names consistent

$oWebsite and $websiteObject are no longer in use.
Redirect page view_article to article

As of 972e4274e801608fd61ab87b52a8a8606592bdf4 pages can now easily be
redirected.
Request object no longer holds an instance of Website

There was no reason for this coupling at all, the relevant methods on
the Page class can simply take two parameters.