fix(package.webpack.json): add angular2-template-loader

closes #1864
Add missing angular2-template-loader dependency

Author: SekibOmazic

public/docs/_examples/webpack/ts/package.webpack.json

@@ -24,6 +24,7 @@
     "zone.js": "0.6.12"
   },
   "devDependencies": {
+    "angular2-template-loader": "^0.4.0",
     "css-loader": "^0.23.1",
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.8.5",