x13? x14? x15?

[DonaldTsang]

x13 adds Hamsi and Fugue to the end of x11, x14 adds Shabal to x13 and x15 adds Whirlpool after x14 (all hashes listed here are 512bits)

• x13 https://github.com/MaruCoinOfficial/x13-hash https://github.com/sherlockcoin/X13-PythonHash and https://github.com/search?q=x13+hash
• x14 https://github.com/webcoinx14/x14_hash https://github.com/mezrin/x14_hash and https://github.com/search?q=x14+hash
• x15 https://github.com/minings/x15_hash https://github.com/kobocoin/node-x15-hash and https://github.com/search?q=x15+hash

x16r and x16 does something weird with their hash

• x16r https://github.com/brian112358/x16r_hash https://github.com/Chinafreak/x16r_hash https://github.com/Gravium/x16r_hash
• x16s https://github.com/namuyan/shield-x16s-hash