[grilo-plugins] tracker upnp bits

[lionel g landwerlin linux intel com]

Hi all,

Here is a patch bringing thumbnail metadata to upnp items in the
tracker database. For this to work you need to install the
tracker-upnp miner, available here :

https://gitorious.org/tracker-upnp

Though there is no hard dependency on it, because the tracker plugin
first check whether the upnp ontology is available or not, so it is
pretty safe to include it.

Regards,

--
Lionel Landwerlin