Checks to see if the latest feed and the cache file don't match before requesting so we don't waste a request.
Checks to see if the latest feed and the cache file don't match before requesting so we don't waste a request.

git-svn-id: a3504485aae10ae057648f6e11ee1e74ee815f6b@38 131f031f-3a30-468c-80f7-b2844c79c7db

EddieRingle/wicketpixie,EddieRingle/wicketpixie