HOWTO: Update to recommend bitcoin core 0.13.1
HOWTO: Update to recommend bitcoin core 0.13.1

Verbalist/electrum-server,pooler/electrum-ltc-server,shsmith/electrum-server,GroestlCoin/electrum-grs-server,spesmilo/electrum-server,shsmith/electrum-server,Verbalist/electrum-server,pooler/electrum-ltc-server,GroestlCoin/electrum-grs-server,spesmilo/electrum-server