update gesture docs

Gesture.md

@@ -17,3 +17,15 @@ There are three pre-defined methods:
   - "*i give up*"
 - hand(): implements:
   - "*`<finger>` forward `<finger>` up*"
+
+Example output of `result.gesture`:
+```js
+[
+  {face: "0", gesture: "facing camera"}
+  {face: "0", gesture: "head down"}
+  {body: "0", gesture: "i give up"}
+  {body: "0", gesture: "leaning left"}
+  {hand: "0", gesture: "thumb forward middlefinger up"}
+]
+```
+Where number after gesture refers to number of person that detection belongs to in scenes with multiple people.

Outputs.md

@@ -41,12 +41,13 @@ result = {
       emotion,     // <string> 'angry', 'discust', 'fear', 'happy', 'sad', 'surpise', 'neutral'
     }
   ],
-  gesture:         // object containing parsed gestures
-  {
-    face,          // <array of string>
-    body,          // <array of string>
-    hand,          // <array of string>
-  }
+  gesture:         // <array of objects object>
+  [
+    {
+      <gesture-type>: <person-number>,
+      gesture: <gesture-string>
+    }
+  ],
   performance = {  // performance data of last execution for each module measuredin miliseconds
                    // note that per-model performance data is not available in async execution mode
     backend,       // time to initialize tf backend, keeps longest value measured