Make picture INFO correct and complete
Make CDirectory::Exists support use directory cache by default.
Merge pull request #2496 from ulion/check_dir_exists_use_dircache

Make CDirectory::Exists support use directory cache by default.
upnp: add support for UpdateObject action to Platinum
upnp: use reference ids for path when available.
upnp: server support for remote file updates
upnp: client support for updating files on server
Merge pull request #2494 from smfontes/pictureinfo

Make picture tags complete and consistent
Merge pull request #2547 from alcoheca/upnp-savestate

UPnP track file state on remote server when supported