Add bower to npm dependencies

Author: Pierre GUINOISEAU

package.json

@@ -46,7 +46,8 @@
     "grunt-protractor-runner": "0.2.3",
     "phantomjs": "1.9.2-6",
     "protractor": "~0.23.0",
-    "chromedriver": "~2.8.1"
+    "chromedriver": "~2.8.1",
+    "bower": "~1.3.9"
   },
   "engines": {
     "node": ">=0.8.0"