the url to dictate arbitrary static method calls.
* Each xxx_rss helper has a single feed() call which takes an id as the argument
* xxx_rss::available_feedS() only returns feeds when they're applicable (ie
if you're viewing a tag, it won't show you an item feed).
* Feed urls are now in the module/feed_id form so that we can bind a
feed id to a given module
* Tightened up the Rss_Controller by using url::merge and some other tricks.
* Made the slideshow module express its own feed.
which fall through to calling &View::__get() have an lvalue to return,
else you can't return them by reference.
Also, don't show sidebar blocks for pages that don't have an item so
that the rss and tag modules don't break the search page.
2) Protect the fullsize image with a permission check
3) Added a content:encoded element to each item which allows the image to show up in the body of the feed.
