add grunt-cli

Author: vladikoff

package.json

@@ -20,10 +20,11 @@
     "test": "grunt nodeunit"
   },
   "devDependencies": {
+    "grunt": "~0.4.1",
+    "grunt-cli": "^1.5.0",
     "grunt-contrib-jshint": "~0.6.4",
     "grunt-contrib-nodeunit": "~0.2.0",
     "grunt-contrib-watch": "~0.5.3",
-    "grunt": "~0.4.1",
     "which": "~1.0.5"
   },
   "keywords": [