we already have ncp, no need for copyFile

app/helpers.js

@@ -279,17 +279,3 @@ exports.rotateImage = function(imgPath, deg, cb) {
     cb(null);
   });
 };
-
-exports.copyFile = function (src, dst, cb) {
-  var is
-    , os;
-
-  fs.stat(src, function (err) {
-    if (err) {
-      return cb(err);
-    }
-    is = fs.createReadStream(src);
-    os = fs.createWriteStream(dst);
-    util.pump(is, os, cb);
-  });
-};

app/selendroid.js

@@ -8,7 +8,7 @@ var errors = require('./errors')
   , status = require("./uiauto/lib/status")
   , exec = require('child_process').exec
   , fs = require('fs')
-  , copyFile = require('./helpers').copyFile
+  , ncp = require('ncp')
   , async = require('async')
   , path = require('path')
   , UnknownError = errors.UnknownError;
@@ -80,7 +80,7 @@ Selendroid.prototype.buildServer = function(cb) {
       return cb(err);
     }
     logger.info("Copying selendroid server to correct destination");
-    copyFile(src, dest, _.bind(function(err) {
+    ncp(src, dest, _.bind(function(err) {
       if (err) {
         logger.error("Error copying selendroid to destination");
         return cb(err);