Minor install errors & fixes

[drscotthawley]

Christian,
The following issues may be unique to my Ubuntu 20.04 system. I hit a few snags with the setup, starting with the fact that "wheel" is not included in requirements.txt, so packages like librosa and torchaudio don't install/build. But adding wheel to the requirements file didn't help, so I put it in a separate line. I also edited the auraloss line in requirements.txt from auraloss==0.1.1 to auraloss=0.1.7 so the requirements pip install would complete without aborting (it couldn't find version 0.1.1).

This then, is the list of commands that yielded successful execution for me:

python3 -m venv env/
source env/bin/activate
pip install wheel
pip install -r requirements.txt
pip install git+https://github.com/csteinmetz1/auraloss

Feel free to ignore/close/whatever or amend your README if you find this helpful.

[drscotthawley]

Ubuntu 18.04 systems needed no such modifications -- worked "as is".