Fix crossdomain requests

- add @crosdomain to all endpoints;
- make default value for 'Cross-Domain-Allow-Origin: *';
- add default allowed headers ('Accept' and 'Content-Type');
- force creation of 'OPTIONS' method on all endpoints;
Force creation of 'novanetwork' network in setup

This network is required for further servers creation.
Ensure straigh argument order for image tasks
PEP8 fix
Merge branch 'newenv-fixes'

Fixes found spinning up new development environment.