implemented unified result.persons that combines face, body and hands for each person

Outputs.md

@@ -82,12 +82,12 @@ result = {
   ],
   gesture:         // <array of objects object>
   [
-    {
-      <gesture-type>: <person-number>,
-      gesture:        <gesture-string>
+    gesture-type: { // type of a gesture, can be face, iris, body, hand
+      id,          // <number>
+      gesture,     // <string>
     }
   ],
-  performance = {  // performance data of last execution for each module measuredin miliseconds
+  performance: {  // performance data of last execution for each module measuredin miliseconds
                    // note that per-model performance data is not available in async execution mode
     frames,        // total number of frames processed
     cached,        // total number of frames where some cached values were used
@@ -102,6 +102,18 @@ result = {
     emotion,       // model time
     change,        // frame change detection time
     total,         // end to end time
-  }
+  },
+  persons:         // virtual object that is calculated on-demand by reading it
+                   // it unifies face, body, hands and gestures belonging to a same person under single object
+  [
+    id,            // <number>
+    face,          // face object
+    body,          // body object if found
+    hands: {
+      left,        // left hand object if found
+      right,       // right hand object if found
+    }
+    gestures: []   // array of gestures
+  ]
 }
 ```

Usage.md

@@ -62,6 +62,9 @@ Internal list of modules and objects used by current instance of `Human`:
 Additional helper functions inside `human.draw`:
 
 ```js
+  human.draw.all(canvas, result)             // interpolates results for smoother operations
+                                             // and triggers each individual draw operation
+  human.draw.person(canvas, result)          // triggers unified person analysis and draws bounding box
   human.draw.canvas(inCanvas, outCanvas)     // simply copies one canvas to another,  
                                              // can be used to draw results.canvas to user canvas on page
   human.draw.face(canvas, results.face)      // draw face detection results to canvas