Create the concept of "page types" which let us specify the kind of
page that we're rendering in high level terms. Currently there are
three page types: album, photo and tag.
The tag page type uses slightly different variables. It has a $tag
but no $item. Adjust all sidebar_block() functions to avoid printing
stuff that's dependent on the item if there is no item.
Simplify the tag code to stop trying to fake an item.
Update the theme slightly to use $item and $tag where appropriate
(notably, for making the <title> element).
1) added a mime_type property to the item module(no database change)
2) created a media_rss module
3) moved most of the functionality for the downloading the images to the media_rss module
Bharat Mediratta
Tim Almdal