Get a working performance analysis environment.
Goal: ability to make pretty graphs locally with both credit mining and multichain (two different branches).
Task: make an Ubuntu channel or other large validated legal collection, with actual "from the wild" downloads.
This environment will be expanded over coming months.

part of #23.
ToDo: read "tragedy of the commons" paper, 1968 problem.

Strategy: Till end of Feb focus on credit mining, then include relaying bandwidth to avoid too much complexity at the start.
Next sprint: co-investor detection?