v2.0.0 2020-11-09 UK

• Rewrite the whole package to use exceptions rather than result type
• Adds many more parsing combinators
• Adds comprehensive unit tests
• Adds comprehensive documentation, host documentation and add links in repo home page
• Adds abstraction for input source
• Provides unix file source and string input source
• Adds separate package reparse-unix for unix file input
• Adds calc.ml and json.ml in examples.