Automatix

- Add conditions

- Fix command-line assignment of variables

- First major release since Automatix seems to be stable
- Add PERSISTENT_VARS
- Newlines for input prompts, which simplifies automatic testing with automatix scripts

- Improve README: Add Usage Example
- Fix redundant code
- Add stack traces in error case
- Minor refactorings

- Refactor main functions
- Add documentation

- Add warning to README