Change all losses, data augmentation and architectures to functions

bob/learn/tensorflow/datashuffler/Base.py

bob/learn/tensorflow/datashuffler/DataAugmentation.py

bob/learn/tensorflow/datashuffler/Disk.py

bob/learn/tensorflow/datashuffler/ImageAugmentation.py

bob/learn/tensorflow/datashuffler/Memory.py

bob/learn/tensorflow/datashuffler/Normalizer.py

bob/learn/tensorflow/datashuffler/SiameseDisk.py

bob/learn/tensorflow/datashuffler/SiameseMemory.py

bob/learn/tensorflow/datashuffler/TFRecord.py

bob/learn/tensorflow/datashuffler/TFRecordImage.py

bob/learn/tensorflow/datashuffler/TripletDisk.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/network/Dummy.py

bob/learn/tensorflow/network/Embedding.py

bob/learn/tensorflow/network/LightCNN29.py

bob/learn/tensorflow/network/MLP.py