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

@@ -19,7 +19,7 @@ python demo.py --help
 
 ### Example outputs
 
-![lpd](./examples/lpd_yunet_demo.gif)
+![lpd](./example_outputs/lpd_yunet_demo.gif)
 
 ## License