Bundle the Leios demo

[dnadales]

Bundle the Leios demo for the following three simultaneous goals:

• It can be easily run with minimal separate preparation.
• We (the developers) can still easily modify it (eg alter the topology, eg alter the internal command lines, eg alter the Python log analyzer, etc)
• We (the developers) can still execute it quickly during active development (eg after changing lines in a Haskell module or two).

We should adapt the README accordingly.