It contains things that look like jinja, but are not.
DEVOPS-3836

Fixes https://github.com/edx/configuration/pull/2821

* autocomplete subcommand names
* autocomplete subcommand options after a -
* autocomplete path names after subcommands (This is the big thing I've
  been missing when running tests)
* autocomplete truncated path names for bokchoy tests

adding tasks

adding credit notice

fixing the main task so that we do not overwrite bashrc

adding . to filename to make it hidden