Add a semi functional prototype of a Querymaker/collection pair for fetching data...

Add a semi functional prototype of a Querymaker/collection pair for fetching data from a remote site. Right now it only manages to fetch genres from the shoutcast directory. There is no caching yet, so it hammers the site pretty hard. Right now this is very shoutcast specific but I plan to factor out as much code as possible later as the concepts apply equally well to other services such as a podcast directory or even the mp3tunes Oboe locker

git-svn-id: svn+ssh://svn.kde.org/home/kde/trunk/extragear/multimedia/amarok@709076 283d02a7-25f6-0310-bc7c-ecb5cbfe19da