Upgraded grunt-contrib-csslint to version 2.0

Author: stevenbenner

package.json

@@ -37,7 +37,7 @@
 		"grunt-contrib-compress": "~1.3",
 		"grunt-contrib-concat": "~1.0",
 		"grunt-contrib-copy": "~1.0",
-		"grunt-contrib-csslint": "~1.0",
+		"grunt-contrib-csslint": "~2.0",
 		"grunt-contrib-cssmin": "~1.0",
 		"grunt-contrib-jshint": "~1.0",
 		"grunt-contrib-qunit": "~1.2",