- Add section tag to support inclusion of ATIS fragments.
- Add visibility, QNH and cloud tokens to support new ATIS formats.
- Add support for starts-with, ends-with and contains comparisons in
conditionals, including negated versions.
- Strip and convert case in comparisons.
- Speak VRB wind direction as "variable".
- Speak zeroes in fractional part of QNH inHg.
- Force US voice in US, Canada and Pacific; UK voice in UK.
