Solved all memory issues

bob/learn/em/cpp/IVectorMachine.cpp

bob/learn/em/empca_trainer.cpp

bob/learn/em/gaussian.cpp

bob/learn/em/gmm_stats.cpp

bob/learn/em/include/bob.learn.em/PLDATrainer.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/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/plda_base.cpp

bob/learn/em/plda_machine.cpp

bob/learn/em/plda_trainer.cpp

bob/learn/em/test/test_jfa_trainer.py

bob/learn/em/test/test_kmeans_trainer.py

bob/learn/em/test/test_plda_trainer.py