Add support for Google Colab

[dominiquesydow]

We currently offer running the notebooks

• locally via Jupyter Lab
• remotely via Binder

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In the future, add support for Google Colab.

Per notebook add cells at the beginning of the notebook to install the dependencies from our teachopencadd environment, e.g. like this (see discussion https://github.com/volkamerlab/teachopencadd/issues/129#issuecomment-913715209):

!pip install condacolab
import condacolab
condacolab.install()

!wget https://raw.githubusercontent.com/volkamerlab/TeachOpenCADD/master/devtools/other-conda-envs/users_env.yml
!mamba env update -n base -f users_env.yml 

However, some dependencies seem to cause problems:

• T010: numpy version does not match with mdanalysis: https://github.com/volkamerlab/teachopencadd/issues/148

[schallerdavid]

I found a workaround for colab and MDAnalysis (#148). However, google colab does not support nglview. So, there is no way we can make all talktorials properly work out on colab (#816).

[hainm]

FYI: https://github.com/googlecolab/colab-cdn-widget-manager/pull/14

[dominiquesydow]

Linking https://github.com/volkamerlab/teachopencadd/pull/151 because the MDAnalysis problem (for Colab or not) may get resolved there.