Latest release accepted by JOSS

New release modifying the code considering PEP8 style guide and adding tests.

Handling zero variance for cepstral mean variance normalization.

This release supports Python version 2.7, 3.4 & 3.5!

Now supporting Python versions 2.7, 3.4 and 3.5!

Add power spectrum.

Adding cepstral mean-variance normalization over the sliding window.

Adding cepstral mean variance normalization.