* Remove RSSFetch.php and move functionality to main RSS class
* Simplify how RSSData is constructed so we can pass it a DOMDocument
object instead of an HTTPResponse.
* Move wf functions into RSS class since they shouldn't really be
globally available.
specified template) to display the feeds and remove hard-coded HTML.
* Add check to make sure the cache dir is writable and put an error in
the debug log if not.
* Remove Snoopy.class.php — replace with use of the Http class.
* Remove RSSParse.php — which was a copy of MagpieRSS and use plain
XML parsing. MagpieRSS looks unmaintained and has security
problems. http://www.madirish.net/?article=253
* Remove references to Magpie RSS
* Remove (over?) use of wf{Supress,Restore}Warnings
* Construct simple RSSData class for normalizing (some of) the feed
data.
