[feature] Allow to perform mass upgrade of devices by their location

[nemesifier]

Same as #213 but with a Location object, this would allow us to upgrade all devices in a specific location.
If both Group and Location are specified, the mass upgrade must act on both, that is, select all devices of that group who are placed in the same location.

We must remember to not forget to add mention of this feature in the README (intro and mass upgrade explanation section).