added productivity functions based on user feedback and fixing minor issues
Improvements:
- added "ck cd {CK entry}" to open a new shell in a given CK entry
- added ck.compare_dicts examples
- fixed some self tests
- added safe recording of JSON (even if some keys are not serializable)
- printing user-friendly name (from info.json "data_name") when removing entries.
Useful when deleting env entries (ck rm env:*) - added more user-friendly configuration of internal CK variables via
$ ck set kernel
$ ck set kernel var.install_to_env=yes - added safe deletion of CK entries with Git files on Windows
- automated adding CK .zip repos without questions