render_list lat/lon tile range option

[Andrey-VI]

Hi!

I've read here https://github.com/gravitystorm/openstreetmap-carto/issues/20#issuecomment-13058442 by @apmon :

The command to render was "./render_list --all -f -m carto -s ~/tiles/rednderd.sock --min-lon 8.1 --max-lon 8.6 --min-lat 48.9 --max-lat 49.2 -z 14 -n 4"

But this option is missing in the current code. Strange… But anyway, good to have this feature.

[hummeltech]

@Andrey-VI, these options are now supported since having merged #190 & #417.