Feat: Prepare dev environment automatically

[Cinux90]

As a contributor I want to contribute fast. I don't want to do a bunch of steps until i can do the "real" work.
So a script which support or guide the contributor to setup the dev environment as much as possible.

[dschier-wtd]

If a script can be provisioned for the workspace (ws-init.sh or similar), this can be releases as a minor release (feat).

[dschier-wtd]

all of the construction work for a new role can be done with the skeleton.
help with the part of virtualenv/pip would help, anyway.