upnp: set SearchCapabilities of UPnP server to "upnp:class"
upnp: implement GetSearchCapabilities in CMediaBrowser
upnp: improved metadata reading/writing
upnpserver: add support for tvshows (object.container.album.videoAlbum) and get more details if asked for it
upnp: add IMediaImporter implementation for UPnP items
media: add IMediaImportHandler implementations for movies, tvshows and episodes
[win32] update VS project files
win32: allow to run mulitple xbmc instances
WIP: plugin integration