Organizing the trainers

bob/learn/tensorflow/analyzers/ExperimentAnalizer.py

bob/learn/tensorflow/analyzers/SoftmaxAnalizer.py

bob/learn/tensorflow/data/BaseDataShuffler.py

bob/learn/tensorflow/loss/ContrastiveLoss.py

bob/learn/tensorflow/loss/TripletLoss.py

bob/learn/tensorflow/script/train_mnist.py

bob/learn/tensorflow/script/train_mnist_siamese.py

bob/learn/tensorflow/script/train_mnist_triplet.py

bob/learn/tensorflow/script/train_mobio.py

bob/learn/tensorflow/trainers/SiameseTrainer.py

bob/learn/tensorflow/trainers/Trainer.py

bob/learn/tensorflow/trainers/TripletTrainer.py

doc/extra-intersphinx.txt