Cn.mops support bed files

Hi Brad,
I added the discussed (https://github.com/chapmanb/bcbio-nextgen/issues/395) regional support into cn.mops, but I just realised that items[0]["config"]["algorithm"].get("variant_regions", None) probably exists for all analyses, including whole genome (as it points to the callable regions bed file)? Do you know if another bed file would be more appropriate?