Move grunt to devDependencies

Author: cdujeu

core/src/plugins/gui.ajax/package.json

@@ -9,7 +9,6 @@
   "author": "",
   "license": "BSD-2-Clause",
   "dependencies": {
-    "grunt": "~0.4.5",
     "chart.js": "^1.0.2",
     "material-ui": "^0.7.5",
     "react": "0.13.3",
@@ -24,6 +23,7 @@
     "classnames": "~2.1.3"
   },
   "devDependencies": {
+    "grunt": "~0.4.5",
     "grunt-babel": "~5.0.3",
     "grunt-contrib-uglify": "~0.9.2",
     "grunt-contrib-watch": "~0.6.1",