Move qunit to devDependencies

Author: mtodd

bower.json

@@ -1,7 +1,9 @@
 {
   "name": "task-lists",
   "dependencies": {
-    "jquery": ">= 1.9.1",
+    "jquery": ">= 1.9.1"
+  },
+  "devDependencies": {
     "qunit": ">= 1.0"
   }
 }