Merge pull request #48 from microsoft/issue-47

change message menu from string to number

samples/csharp_dotnetcore/Microsoft.Bot.Builder.Adapters.WeChat.TestBot/Resources/MessageMenu.json

@@ -1,14 +1,13 @@
 {
-  "head_content": "Are you satisfied with this service?",
-  "list": [
-    {
-      "id": "101",
-      "content": "Satisfied"
-    },
-    {
-      "id": "102",
-      "content": "NotSatisfied"
-    }
-  ],
-  "tail_content": "You are welcome to come back again."
+    "head_content": "Are you satisfied with this service?",
+    "list": [{
+            "id": 101,
+            "content": "Satisfied"
+        },
+        {
+            "id": 102,
+            "content": "NotSatisfied"
+        }
+    ],
+    "tail_content": "You are welcome to come back again."
 }