Add multi item support to standard request format documentation

REQUEST_FORMAT.md

@@ -9,15 +9,32 @@ and type-dependent data. e.g.
 ```
 {
     "type": "image",
-    "path": "/path/to/image"
+    "paths": [
+        {
+            path: "/path/to/image/",
+            url: "/url/to/more/information/or/full/size/image"
+        },
+        {
+            path: "/path/to/image2/",
+            url: "/different/url/to/more/information/or/full/size/image2"
+        }
+    ]
 }
 ```
 
 ```
 {
     "type": "text",
+    "texts": [
+        {
             "text": "This will hopefully be useful information.",
-    "url": "link_to_external_page_with_more_information"
+            "url": "http://example.com/"
+        },
+        {
+            "text": "This is about funny frog.",
+            "url": "/link/to/external/page"
+        }
+    ]
 }
 ```