Merge pull request #589 from phutchins/master

Adding more detailed logging  with host and port when there are RPC conn...

Author: maraoz

lib/RpcClient.js

@@ -204,7 +204,7 @@ function rpc(request, callback) {
     });
   });
   req.on('error', function(e) {
-    var err = new Error('Could not connect to bitcoin via RPC: ' + e.message);
+    var err = new Error('Could not connect to bitcoin via RPC at host: ' + self.host + ' port: ' + self.port + ' Error: ' + e.message);
     log.err(err);
     callback(err);
   });