Changing name from 'get_filterbanks' to 'filterbanks'.

Signed-off-by: Eduardo Tenorio <embatbr@gmail.com>
Removing function 'logpowspec' and improving tests.

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

TODO insert the Hamming window.

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