Add BSTY segwit, LTC testnet, update BTC testnet

[gcharang]

Creating an issue to track various user requests

[cipig]

BSTY-segwit does not work... unfortunately i haven't wrote down the reason in my docs... this was the config

  { 
    "coin": "BSTY-segwit",
    "name": "globalboost",
    "fname": "GlobalBoost-Y",
    "rpcport": 8225,
    "pubtype": 77,
    "p2shtype": 139,
    "wiftype": 208,
    "txfee": 200000,
    "segwit": true,
    "bech32_hrp": "gb",
    "address_format": {
      "format": "segwit"
    },
    "orderbook_ticker": "BSTY",
    "mm2": 1,
    "required_confirmations": 1,
    "avg_blocktime": 600,
    "protocol": {
      "type": "UTXO"
    }
  },