Doc update

[noxilixon]

The install instructions with -f (for force) in the readme failed for me. Using -r (to select a requirements file) works.

[FFHener]

Could you squash the two fix: set terminology according to lint settings commits together? Otherwise lgtm

[nicolasberens]

you can change the commands to

pip install --force --requirement requirements.txt

and

ansible-galaxy install --force --role-file requirements.yml 

that way it is enforced that libraries also get updated (and a bit more explicit what it does)