add sort table

Author: PanJiaChen

package.json

@@ -27,13 +27,14 @@
     "nprogress": "0.2.0",
     "showdown": "1.6.4",
     "simplemde": "1.11.2",
+    "sortablejs": "^1.5.1",
     "vue": "2.2.6",
+    "vue-count-to": "1.0.5",
     "vue-multiselect": "2.0.0-beta.14",
     "vue-router": "2.3.0",
     "vuedraggable": "2.8.4",
     "vuex": "2.2.1",
-    "xlsx": "0.8.1",
-    "vue-count-to":"1.0.5"
+    "xlsx": "0.8.1"
   },
   "devDependencies": {
     "autoprefixer": "6.7.2",