Final working version

Fixed private address space, lookup error (assume /16), empty WHOIS data (assume /16), incorrect range (i.e. 0.0.0.0 - 255.255.255.255 - assume /8), where ASN and/or countrycode are None and where WHOIS range incorrectly reported as CIDR value (assume /16).
Merge pull request #1 from baltyn/final_version

Final working version