Feature solid solid cht

[EvertBunschoten]

Added tutorial files for setting up a simulation for conjugate heat transfer between both solid and fluid domains.

Related to SU2 branch feature_solid-solid_cht.

[pcarruscag]

The meshes in TestCases are generated from these scripts?
You can add the meshes here to make the tutorial more self contained. I think the others are like that too.

[EvertBunschoten]

The meshes in TestCases are generated from these scripts? You can add the meshes here to make the tutorial more self contained. I think the others are like that too.

I added the mesh files and I'll update the tutorial description in the github.io repo.