BIP0039 Added Japanese wordlist
Moved wordlists to separate file.
Fixed wordlist links to account for new document
Clarify the normalization will fix mixed space use
Added Japanese test vectors
formatting
Wordlist update.

Brushed up wordlist:
1. First 3 characters are unique for every word.
2. No more words less than 3 characters.
Merge pull request #92 from bip39JP/master

BIP0039 Added Japanese wordlist