brassica-0.1.0: ChangeLog.md

# Brassica changelog

## Unreleased changes

- Allow category backreferencing with `@n` before category
- Allow forcing nondeterminism with `@?` before category
- Add ‘input→output’ format for output words
- Change default output format for MDF input to wordlist in CLI
- Add ‘or environments’ with syntax ‘target / replacement / env1 / env2 / env3 / …’.
  Former rule exceptions with similar syntax have been changed to syntax ‘target / replacement / env // exception’.
- Improve documentation