Training UBM-GMM for male and female subpopulations, with 13 cepstral coefficients, M = 1024 and delta values 0, 1, and 2. Each UBM-GMM in trained in 10 to 20 minutes. The training is not considering changes in variances (not because of time, but because of some bugs). Also, debug messages contribute to slow the process.

The entire process may take 2 hours. The code is optimized, but can be improved (at least to use less memory - actually 1.8 GiB). Next commit will be the UBM-GMMs.

Signed-off-by: Eduardo Tenorio <embatbr@gmail.com>