Adding grunt-cli to get Travis working

Author: jacobawenger

package.json

@@ -36,6 +36,7 @@
   },
   "devDependencies": {
     "grunt": "~0.4.1",
+    "grunt-cli": "^0.1.13",
     "grunt-contrib-concat": "^0.4.0",
     "grunt-contrib-connect": "^0.7.1",
     "grunt-contrib-jshint": "~0.10.0",