add html-webpack-plugin to package.json

Author: bigandy

package.json

@@ -38,6 +38,7 @@
     "expose-loader": "^0.6.0",
     "gulp": "^3.9.0",
     "gulp-ngdocs": "^0.2.13",
+    "html-webpack-plugin": "^1.6.1",
     "ng-annotate-loader": "~0.0.6",
     "path": "^0.4.9",
     "util": "^0.10.3",