Use the formatted adapter for whois.nic.ad.jp to suppress non-utf8 output

I think this can close #21 because the Korean whois server already returns UTF-8 output.

### Output of Whois.lookup('218.43.43.43')

Before:
```
[ JPNIC database provides information regarding IP address and ASN. Its use   ]
[ is restricted to network administration purposes. For further information,  ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output,        ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

Network Information: [%M%C%H%o!<%/>pJs]
a. [IP%M%C%H%o!<%/%"%I%l%9]     218.43.0.0/17
b. [%M%C%H%o!<%/L>]             OCN
f. [AH?%L>]                     %*!<%W%s%3%s%T%e!<%?%M%C%H%o!<%/
g. [Organization]               Open Computer Network
m. [4IM}<TO"MmAk8}]             AY1361JP
n. [5;=QO"MmC4Ev<T]             TT10660JP
n. [5;=QO"MmC4Ev<T]             KK551JP
n. [5;=QO"MmC4Ev<T]             TT15086JP
p. [%M!<%`%5!<%P]               ns-kg001.ocn.ad.jp
p. [%M!<%`%5!<%P]               ns-kn001.ocn.ad.jp
[3dEvG/7nF|]                    2001/11/27
[JV5QG/7nF|]
[:G=*99?7]                      2001/12/25 19:39:40(JST)

>e0L>pJs
----------
%(%L!&%F%#!&%F%#!&%3%_%e%K%1!<%7%g%s%:3t<02q<R (NTT COMMUNICATIONS CORPORATION)
                     [3d$j?6$j]                                  218.43.0.0/16

2<0L>pJs
----------
3:Ev$9$k%G!<%?$,$"$j$^$;$s!#
```

After: 
```
[ JPNIC database provides information regarding IP address and ASN. Its use   ]
[ is restricted to network administration purposes. For further information,  ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output,        ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

Network Information:
a. [Network Number]             218.43.0.0/17
b. [Network Name]               OCN
g. [Organization]               Open Computer Network
m. [Administrative Contact]     AY1361JP
n. [Technical Contact]          TT10660JP
n. [Technical Contact]          KK551JP
n. [Technical Contact]          TT15086JP
p. [Nameserver]                 ns-kg001.ocn.ad.jp
p. [Nameserver]                 ns-kn001.ocn.ad.jp
[Assigned Date]                 2001/11/27
[Return Date]
[Last Update]                   2001/12/25 19:39:40(JST)

Less Specific Info.
----------
NTT COMMUNICATIONS CORPORATION
                     [Allocation]                                218.43.0.0/16

More Specific Info.
----------
No match!!
```