Add back example output images as lfs tracked files (#166)

* lfs track images now

* add back example images

* modify paths

* modify paths part 2

* correct paths in each model's readme

README.md

@@ -18,9 +18,9 @@ python demo.py --help
 
 ### Example outputs
 
-![webcam demo](./examples/pphumanseg_demo.gif)
+![webcam demo](./example_outputs/pphumanseg_demo.gif)
 
-![messi](./examples/messi.jpg)
+![messi](./example_outputs/messi.jpg)
 
 ---
 Results of accuracy evaluation with [tools/eval](../../tools/eval).