[build] added webapp task

package.json

@@ -5,12 +5,18 @@
   "devDependencies": {
     "ansi-colors": "^1.0.1",
     "async": "^2.6.0",
+    "babel-core": "^6.26.0",
+    "babel-preset-es2015": "^6.24.1",
     "download": "^6.2.5",
     "fancy-log": "^1.3.2",
     "fs-extra": "^5.0.0",
     "got": "^8.0.1",
     "gulp": "github:gulpjs/gulp#4.0",
+    "gulp-babel": "^7.0.0",
     "gulp-clean": "^0.3.2",
+    "gulp-concat": "^2.6.1",
+    "gulp-template": "^5.0.0",
+    "gulp-uglify": "^3.0.0",
     "plugin-error": "^0.1.2",
     "progress": "^2.0.0",
     "promise-streams": "^2.1.1",