Add start script for npm command.

bin/start-libbitcoind.js

@@ -0,0 +1,28 @@
+#!/usr/bin/env node
+
+'use strict';
+
+var chainlib = require('chainlib');
+var log = chainlib.log;
+
+process.title = 'libbitcoind';
+
+/**
+ * daemon
+ */
+var daemon = require('../').daemon({
+  datadir: process.env.BITCORENODE_DIR || '~/.bitcoin',
+  network: process.env.BITCORENODE_NETWORK || 'testnet'
+});
+
+daemon.on('ready', function() {
+  log.info('ready');
+});
+
+daemon.on('error', function(err) {
+  log.info('error="%s"', err.message);
+});
+
+daemon.on('open', function(status) {
+  log.info('status="%s"', status);
+});