MFCC F32 implementation
MFCC F32 tests
MFCC F32 in Python wrapper
Python wrapper structure updated to support submodule like
cmsisdsp.mfcc and cmsisdsp.fixedpoint
PythonWrapper tests updated to use the new fixedpoint
cmsisdsp.mfcc is used to generate the mel filter, dct and window coefficients.
Added new tests for cfft.
Improved error handling when not enough memory allocated in testmain.cpp
Corrected arm_math.h (replaced inline by preprocessor definition).
Added example debug script to read pattern and output of tests using
scipy.