Add grunt-cli as dev dependancy

Author: nikcub

package.json

@@ -34,6 +34,7 @@
     "coveralls": "^2.11.8",
     "doctoc": "^1.0.0",
     "grunt": "^0.4.5",
+    "grunt-cli": "^1.2.0",
     "grunt-contrib-connect": "^0.11.2",
     "grunt-contrib-copy": "^0.8.2",
     "grunt-contrib-cssmin": "^0.14.0",