Update on anacondas terms of service affecting "defaults" channel

[glabbe]

We will need to update the biohansel code following this year's changes to the anacondas terms of service. We should change the installation instructions to remove the use of the "defaults" channel, and instead install the individual packages that are required by biohansel using miniconda or miniforge.

The Anaconda Repository now requires a license for any use at companies with 200 or more employees that are not educational or academic instructional organizations (including, for example, non-university research entities and national laboratories). If you’re an employee using Anaconda at work or for your company:
-Downloading, installing, using, and updating packages from the Anaconda Repository (“defaults” channels, see: https://repo.anaconda.com/pkgs/) is governed by our Terms of Service, regardless of installer. A commercial fee license is required if you work at a company with 200 or more employees.
-Downloading, installing, using, and updating packages from anaconda.org, including the conda-forge channel, is free (with exclusion of the channels mirrored from the defaults channel as explained in guideline 2)).

Recommendations from Aaron (NML): • Conda channels
o https://www.anaconda.com/blog/update-on-anacondas-terms-of-service-for-academia-and-research
o Older blog post: https://www.anaconda.com/blog/is-conda-free
o Recommendations
 Install either miniconda or miniforge (not the anaconda distribution)
 Check channels and remove the following if present: main, defaults, r, msys2, anaconda
 The conda-forge and bioconda channels are free and okay to use