Reorganized the MAP and ML trainers

bob/learn/misc/MAP_gmm_trainer.cpp

bob/learn/misc/ML_gmm_trainer.cpp

bob/learn/misc/__MAP_gmm_trainer__.py

bob/learn/misc/__ML_gmm_trainer__.py

bob/learn/misc/cpp/MAP_GMMTrainer.cpp

bob/learn/misc/cpp/ML_GMMTrainer.cpp

bob/learn/misc/include/bob.learn.misc/GMMBaseTrainer.h

bob/learn/misc/include/bob.learn.misc/MAP_GMMTrainer.h

bob/learn/misc/include/bob.learn.misc/ML_GMMTrainer.h

bob/learn/misc/main.cpp

bob/learn/misc/main.h

bob/learn/misc/test_em.py

setup.py