Use webpack to build

package.json

@@ -9,7 +9,7 @@
     "install": "cd src && npm install",
     "postinstall": "npm run build",
     "build": "gulp build",
-    "start": "electron src",
+    "start": "electron dist",
     "serve": "gulp serve",
     "test": "gulp build && mocha",
     "package": "gulp package",
@@ -20,6 +20,8 @@
     "prettify": "gulp prettify"
   },
   "devDependencies": {
+    "babel-core": "^6.5.1",
+    "babel-loader": "^6.2.2",
     "babel-preset-react": "^6.3.13",
     "chromedriver": "^2.20.0",
     "del": "^2.2.0",
@@ -33,9 +35,13 @@
     "gulp-changed": "^1.3.0",
     "gulp-esformatter": "^5.0.0",
     "gulp-jsbeautifier": "^1.0.1",
+    "json-loader": "^0.5.4",
     "mocha": "^2.3.4",
     "mocha-circleci-reporter": "0.0.1",
     "should": "^8.0.1",
-    "webdriverio": "^3.3.0"
+    "style-loader": "^0.13.0",
+    "vinyl-named": "^1.1.0",
+    "webdriverio": "^3.3.0",
+    "webpack-stream": "^3.1.0"
   }
 }