Adding information on how to install FEniCS

[IshaanDesai]

This PR adds a section to the FEniCS-preCICE adapter page providing information on how to install FEniCS. Closes #82

[MakisH]

Looks good already, thanks!

I currently get segmentation faults immediately when trying to run any FEniCS tutorial, but I guess this is not something we need to wait for here.

In the vm, we use the --no-install-recommends option. I don't remember the details now, but I think the PPA repository also contains some alternative versions of some dependencies that somehow caused issues on Ubuntu 20.04. This does not fix my issue.

[IshaanDesai]

I currently get segmentation faults immediately when trying to run any FEniCS tutorial, but I guess this is not something we need to wait for here.

Do you get a segmentation fault for any of our tutorial cases or some other tutorials provided by FEniCS? If it is the former case then we should look into via an issue in the tutorials repo.

[MakisH]

Do you get a segmentation fault for any of our tutorial cases or some other tutorials provided by FEniCS? If it is the former case then we should look into via an issue in the tutorials repo.

Not sure about FEniCS-only tutorials. What could I run? We could also debug this together offline.

[IshaanDesai]

Not sure about FEniCS-only tutorials. What could I run? We could also debug this together offline.

Okay no I just misunderstood you. I understand now that you ran one of the preCICE tutorials with FEniCS as a participant. If your FEniCS installation is suddenly broken then please have a look at the troubleshooting section. Otherwise yes lets debug this together offline sometime.