[sphinx] Fixing WArnings

README.rst

bob/learn/tensorflow/__init__.py

bob/learn/tensorflow/analyzers/__init__.py

bob/learn/tensorflow/datashuffler/Base.py

bob/learn/tensorflow/datashuffler/Disk.py

bob/learn/tensorflow/datashuffler/Memory.py

bob/learn/tensorflow/datashuffler/OnlineSampling.py

bob/learn/tensorflow/datashuffler/TripletMemory.py

...n/tensorflow/datashuffler/TripletWithFastSelectionDisk.py

...learn/tensorflow/datashuffler/TripletWithSelectionDisk.py

...arn/tensorflow/datashuffler/TripletWithSelectionMemory.py

bob/learn/tensorflow/datashuffler/__init__.py

bob/learn/tensorflow/layers/Layer.py

bob/learn/tensorflow/layers/__init__.py

bob/learn/tensorflow/loss/ContrastiveLoss.py

bob/learn/tensorflow/loss/TripletLoss.py

bob/learn/tensorflow/network/SequenceNetwork.py

bob/learn/tensorflow/network/VGG16_mod.py

bob/learn/tensorflow/test/test_cnn.py

bob/learn/tensorflow/test/test_cnn_load.py