Merge branch '22-documentation-of-this-package-sucks' into 'master'

.gitignore

bob/learn/em/gmm_machine.cpp

bob/learn/em/include/bob.learn.em/KMeansTrainer.h

bob/learn/em/isv_base.cpp

bob/learn/em/isv_machine.cpp

bob/learn/em/isv_trainer.cpp

bob/learn/em/ivector_machine.cpp

bob/learn/em/ivector_trainer.cpp

bob/learn/em/jfa_base.cpp

bob/learn/em/jfa_machine.cpp

bob/learn/em/jfa_trainer.cpp

bob/learn/em/kmeans_machine.cpp

bob/learn/em/kmeans_trainer.cpp

bob/learn/em/linear_scoring.cpp

bob/learn/em/map_gmm_trainer.cpp

bob/learn/em/ml_gmm_trainer.cpp

bob/learn/em/test/test_kmeans_trainer.py

bob/learn/em/train.py

bob/learn/em/ztnorm.cpp

doc/conf.py