Multi-processing per video stream

Change-Id: Ia8d64082261108ee548a6f7c56c40b51203e9322
diff --git a/person_detection/app.py b/person_detection/app.py
index 3605ea0..05eaba4 100644
--- a/person_detection/app.py
+++ b/person_detection/app.py
@@ -63,4 +63,4 @@
 
 if __name__ == '__main__':
     args = build_argparser().parse_args()
-    app.run(host='0.0.0.0', threaded=True)
+    app.run(host='0.0.0.0', threaded=False, processes=3)