- allow max_slices and max_slivers to be set when adding a new site
- allow max_slices and max_slivers to be set when adding a new site


dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi