Merge branch 'style-transfer' into 'master'

...tensorflow/configs/style_transfer/inception_v1_example.py

...tensorflow/configs/style_transfer/inception_v2_example.py

bob/learn/tensorflow/configs/style_transfer/vgg19_example.py

...rn/tensorflow/configs/style_transfer/vincent_van_gogh.jpg

...n/tensorflow/configs/style_transfer/vincent_van_gogh2.jpg

bob/learn/tensorflow/loss/StyleLoss.py

bob/learn/tensorflow/loss/__init__.py

bob/learn/tensorflow/network/InceptionResnetV1.py

bob/learn/tensorflow/network/InceptionResnetV2.py

bob/learn/tensorflow/network/Vgg.py

bob/learn/tensorflow/network/__init__.py

bob/learn/tensorflow/network/utils.py

bob/learn/tensorflow/script/style_transfer.py

bob/learn/tensorflow/style_transfer/__init__.py

bob/learn/tensorflow/style_transfer/neural_transfer.py

.../test/data/dummy_image_database/m301_01_p01_i0_0_GRAY.png

bob/learn/tensorflow/test/test_architectures.py

bob/learn/tensorflow/test/test_image_dataset.py

bob/learn/tensorflow/test/test_style_transfer.py

conda/meta.yaml