Also refactoring of completion logic.
Work in progress.
Use default filenames completion in bash if there were no generated c…
…ompletions (Ref #28)
Refactor and improve basic shell completion feature (Ref #28)
- more correct handling the completion after flag() options
- stop completion after only() options
- do not complete on commands after options was entered
- and more
Implement shell completion for fs paths (Ref #28)
A bit more refactoring