Ledger integration

Please refer to https://github.com/brian112358/ledger-wallet-chrome/commit/303f5030059c805d808c83466275e078d06afbb5 to confirm any of the details below.

bitcoin.networks.ravencoin

bitcoin.networks.ravencoin =
  magicPrefix: '\x16Raven Signed Message:\n'
  bip32:
    public: 0x0488B21E,
    private: 0x0488ADE4
  pubKeyHash: 60
  scriptHash: 122

ravencoin

  ravencoin:
    name: 'ravencoin'
    display_name: 'ravencoin'
    plural: 'ravencoins'
    scheme: 'ravencoin:'
    bolosAppName: 'ravencoin'
    ticker: 'rvn'
    tickerKey:
      from: 'fromRVN'
      to: 'toRVN'
    bip44_coin_type: '175'
    isSegwitSupported: no
    version:
      regular: 60
      P2SH: 122
      XPUB: 0x0488B21E
    bitcoinjs: bitcoin.networks.ravencoin
    dust: 10000
    handleFeePerByte: no
    areTransactionTimestamped: no

ledger.preferences.ravencoin

ledger.preferences.ravencoin =
  Display:
    units:
      bitcoin:
        symbol: 'RVN'
        unit: 8
      milibitcoin:
        symbol: 'mRVN'
        unit: 5

  # Coin preferences
  Coin:
    explorers:
      hash4life:
        name: 'Hash4Life'
        address: 'https://rvn.hash4.life/tx/%s'
      rvnblockchain:
        name: 'raven-blockchain.info'
        address: 'http://raven-blockchain.info/tx/%s'
      rvnhodl:
        name: 'rvnhodl'
        address: 'http://rvnhodl.com/tx/%s'
    discoveryGap: 20