[Bugfix] Refactoring & Model path & attribute handling

Hi Aleksey,

install script: If you delete these entries, all images respectively all category image paths would be deleted. So we changed it to your new model. 

model movement: Your model name didn't match model path. So we moved it on the right place.

refactoring (@see & model-node): We may not use CamelCase at this point.

best regards,

steven