write examples for all parameters which need input
e.g. zoo init --client 'localhost:28001' --db testdb --cell InfluenzaPA test.json
-> couldn't find --client in the examples
add autocomplete function.
e.g. zoo init --cl (pressing tabulator) leads to zoo init --client
-h
zoo init --client 'localhost:28001' --db testdb --cell InfluenzaPA test.json
-> couldn't find--client
in the exampleszoo init --cl
(pressing tabulator) leads tozoo init --client