Extracting only low-level prosody features from speech audios with Python

Low-level features: 6 (absolute pitch in log Hz, relative pitch which is z-normalized pitch,energy, cepstral flux,speaking frames from pitch and speaking frames from energy.
The approach implemented here can be used both with monos and stereos but only '.wav' files(for now).
Also, includes codes to get the means and standard deviation and z normalizing the extracted prosody features.