Reverb Use case

[kslong]

@smangham has provided a use case for reverberation mapping. This use case needs to be tested by others, and the results documented nere

[kslong]

@smangham I am just collecting up problems here. Ultimately we should fix all of them.

• py4py did not load even though i added py_progs/py4py to my path. The only way to get it to load was to put the version of py4py/py4py at the level of py_progs -It seems to me odd that we don't have reverb_low and reverb_high.pf in the directory for the use case. I wold use a sys comand to run the script, only asking the user to set the number of processors. I think the best strategy is for Jypyter scripts to run out of the box, with minimal user interaction
• Why is mdot_wind in reverb_low and high, so different from the base line model

[kslong]

@smangham The changes to the .pf files in the notebook for reverb_low and reverb_high are identical. Please let me know immediately what they were supposed to be. I don't need you to do anything more at this, point, since I want to work through the whole script, before discussing what needs changing.

[smangham]

Apologies for missing this at the time.

The pip install -e . mode (also Make install in py_progs/py4py) definitely works, and is what I'd recommend. I've added this to the py4py README.md file.

The justification for not including the reverb_low.pf and reverb_high.pf (and reverb_extended.py) files is they need an internal line number, and that may change if the data files are altered. I'll put it in anyway. There's an open issue to make this less terrible. I've updated the notebook to replace the bash entries with cells with os.system calls.

I think the missing variation on the low and high files has already been fixed- can't remember if I did it around when Matt hit this problem, or if someone else did. I think I'd just accidentally written Wind.mdot instead of Disk.mdot.