dwhois.tets.whois: renamed load_config to whois_config
dwhois.whois: teredo extraction
dwhois/whois.yml: Removed 0.0.0.0 -> UNKNOWN
dwhois.whois: Implemented server detection for IPs
dwhois.whois: Implemented server for email addresses (error)
dwhois.whois: _guess_server defaults to exception
dwhois.whois: Implemented server detection for as numbers
dwhois.whois: Refactored external whois lookup