User shouldn't need to pip install from sources other than PyPI

[DBraun]

PyPI doesn't allow dependencies to modules on GitHub. The modules must be directly available on PyPI.

However, AudioTree needs features from some branches whose PRs haven't been merged yet into the PyPI-hosted modules. Therefore, the user is asked to install those branches manually.

To avoid this, I'm asking for these PRs to be reviewed and merged soon. Let me know how I can help. Thanks.

google-deepmind/dm_aux#3
pseeth/argbind#17
boris-kuz/jaxloudnorm#1 (jaxloudnorm also needs to be put on PyPI)