merged: r33346, r33351 from trunk.

fixed: Ability to retrieve fanart from JSON-RPC was broken.  Part of #9517, thanks to Nuka1195.
fixed: Removed folder wasn't detected during scan, causing cleanonupdate to not pick it up.

git-svn-id: https://xbmc.svn.sourceforge.net/svnroot/xbmc/branches/Dharma@33776 568bbfeb-2a22-0410-94d2-cc84cf5bfa90