[runes] (pertubator) Add a ImageModifierABC class

...nes/research/robots_at_runes/dataset/dataset_generator.py

...t_runes/dataset/perturbations/image_modifiers/__init__.py

...runes/dataset/perturbations/image_modifiers/brightness.py

...t_runes/dataset/perturbations/image_modifiers/contrast.py

...es/dataset/perturbations/image_modifiers/gaussian_blur.py

...s/dataset/perturbations/image_modifiers/gaussian_noise.py

.../dataset/perturbations/image_modifiers/horizontal_blur.py

...taset/perturbations/image_modifiers/image_modifier_abc.py

...runes/dataset/perturbations/image_modifiers/saturation.py

...arch/robots_at_runes/dataset/perturbations/perturbator.py

...dataset/perturbations/perturbator_functions/brightness.py

...s/dataset/perturbations/perturbator_functions/contrast.py

...aset/perturbations/perturbator_functions/gaussian_blur.py

...set/perturbations/perturbator_functions/gaussian_noise.py

...et/perturbations/perturbator_functions/horizontal_blur.py

...dataset/perturbations/perturbator_functions/saturation.py

...s/research/robots_at_runes/dataset/perturbations/utils.py