Update .gitignore

Author: sumerjoshi

.gitignore

@@ -200,7 +200,10 @@ cython_debug/
 model/pretrained/pretrained_models/*.pth
 
 # Prevent any .pth files being added as a saved model.
-model/saved_models/*.pth*
+model/saved_models/*.pth
+
+# Include model hierarchy
+!model
 
 # No data in the data/train folder
 data/train/*