add dependencies to package.json

Author: dryabov

package.json

@@ -34,10 +34,12 @@
         "grunt": "~0.4.2",
         "grunt-cli": "~0.1.11",
         "grunt-contrib-clean": "~0.4.0",
+        "grunt-contrib-copy": "~0.5.0",
         "grunt-contrib-concat": "~0.3.0",
         "grunt-contrib-jshint": "~0.6.0",
         "grunt-contrib-qunit": "~0.2.0",
         "grunt-contrib-uglify": "~0.2.0",
+        "grunt-contrib-cssmin": "~0.6.0",
         "grunt-contrib-watch": "~0.4.0"
     }
 }