YAMNet model was causing issues, as loading a pytorch framework model, when the tensorflow based YAMNet is loaded in the same environment already, caused segmentation fault
- add additional params: sr=None and mono=False for freqsplit/input/file_reader/read_audio()
- remove loading audio using librosa in freqsplit/preprocessing/classify/classify_audio()
- add error handling, if the sr is not 16Khz
- raise RuntimeError, if YAMNet model fails
- update tests/test_preprocessing