Beyond PSCC Paper: Develop documentation

[frederikgeth]

For now, this is future work. Instead, the readme was expanded, and workflow example is developed in examples/case5_spm.jl.

[timmyfaraday]

Big fan of this example, thought about turning it in a Pluto notebook, would enable more elegant description and plotting.
However, this is a bit difficult for a non-registered package. Any opposition on registering the package for this purpose?

[timmyfaraday]

Big fan of this example, thought about turning it in a Pluto notebook, would enable more elegant description and plotting. However, this is a bit difficult for a non-registered package. Any opposition on registering the package for this purpose?

Decided as of now not to register the package. A fix for the Pluto notebook is available.