Load the model via a path to a folder

Closes #210 (closed)

docs/get_started/development.md

@@ -42,9 +42,7 @@ The library already has all the documents needed to run the [predict command](..
 teklia-dan predict \
     --image-dir images/ \
     --image-extension png \
-    --model popp_line_model.pt \
-    --parameters parameters.yml \
-    --charset charset.pkl \
+    --model . \
     --output /tmp/dan-predict
 ```