netorcai.standalone: netorcai agent in a box#1

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FlorentBecker wants to merge 3 commits intonetorcai:masterfrom

FlorentBecker:master

Commits on Aug 2, 2019

hello-visu: actually visualise something
FlorentBeckerIUT45
committed
Rename client into agent (they can also run on a "server" socket)
FlorentBeckerIUT45
committed
Add netorcai.standalone (canned agent-running programs)
FlorentBeckerIUT45
committed